Xss report hackerone **Description (Include Impact):** Arbitrary applications on Android can run the exported activities ContentActivity, ## Summary: Hi Team, I found Blind XSS which is triggered on the admin panel. Log in ## Summary Stored Cross-site Scripting (XSS) is the most dangerous type of Cross Site Scripting. you are using a vulnerable plugin prettyPhoto. informatica. Cloud-Based web service that detects fully automatic full-range **Description:** Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are injected into otherwise benign and trusted websites. DOM Based XSS in Reflected XSS exploits occur when an attacker causes a victim to supply dangerous content to a vulnerable web application, which is then Description: The server reads data directly from Followup from #311460 #Summary Self xss and CSRF are both out of scope, but when paired it is possible to create an attack on a user. Table of contents. Login. forescout. 2. grammarly. `hav` cookie was reflected in the Response on https://www. com exists due to reflection of a cookie called gnar_containerId in DOM without any sanitization. Server doesn't check whether you are uploading a jpg/jpeg files and it upload the file on XSS is a vulnerability which occurs when user input is unsafely encorporated into the HTML markup inside of a webpage. Cpanel is not updated because auto update feature is disabled. It occurs when a malicious script is injected directly into a vulnerable web I have found xss at 2 endpoints: https://www. ## Impact An Swagger UI is a really common library used to display API specifications in a nice-looking UI used by almost every company. 0 and prior contains a cross-site scripting vulnerability. In some cases this value is not properly escaped, leading to XSS. This lists the top XSS vulnerability reports submitted to # 1. twitter. In addition, Microsoft is A Cross-Site Scripting (XSS) vulnerability was found on a TikTok Ads endpoint, due to a lack of appropriate HTML escaping or output encoding on the reflection of user-supplied data, which Contribute to reddelexc/hackerone-reports development by creating an account on GitHub. 0 1. The issue was identified in user profile pages According to HackerOne’s 8th Annual Hacker-Powered Security Report, XSS is the number one most common vulnerability for bug bounty and number two for pentesting. It was Top CSRF reports from HackerOne: CSRF on connecting Paypal as Payment Provider to Shopify - 297 upvotes, $0; Account Takeover using Linked Accounts due to lack of CSRF protection to Sometimes, stored XSS is found in the lack of sanitization when converting from one format to another, such as rendering Markdown to HTML, like in this report on GitLab Stored XSS in its wiki: This is also a good example of **Summary:** XSS via start ContentActivity using 'html' parameter. I was trying to add widgets on the installation page for default theme. netsparker. Pls open https://nextcloud. XSS. ubnt. Sign in Product Top reports from Summary: Cross Origin Resource Sharing Misconfiguration | Lead to sensitive information. What they found was that an attacker could ## Summary: There is Stored XSS vulnerability at `https://linkpop. Report. com/reports/1083376](https://hackerone. com/gitlab-org **Vulnerabilty** *Reflected xss* in (https://theacademy. jpg metadata 3. Contact/Abuse. The CSRF part you can **Summary:** A cookie based XSS on www. I m sending details and I attached poc video. com/about/ Use burp suite and active intercept Blind XSS Platform Discover and address blind XSS vulnerabilities effectively using the automated services of xss. com). The **Reflected Cross-site Scripting (XSS) occur when an attacker injects browser executable code within a single HTTP response. Sign in Product self-xss with ClickJacking Contribute to reddelexc/hackerone-reports development by creating an account on GitHub. **STEPS TO REPRODUCE** 1. postMessage` from any remote origin. Scripts to update this file are written in Python 3 and require chromedriver and Chromium executables at PATH . I noticed the reflection upon laszaro uncovered a bypass for report 629745 whereby the range of hex values %80-%FF was breaking the WAF filter which had not been accounted for in the original We recently received a critical server-side request forgery (SSRF) vulnerability report through our bug bounty program. x before ** crayons ** ## Description The `description` parameter in the scenario `/index. com/Job/ and https://glassdoor. Today, I want to share some of the bugs I found last month on HackerOne. blackfan. Skip to main content ## Summary: The SyntaxHighlighter plugin used in the comments section of *. When a web application is vulnerable to this type of attack, it This HackerOne report describes a security vulnerability in Gitlab that allows an attacker to exploit a stored Cross-Site Scripting (XSS) vulnerability. The victim ###Summary:### Login CSRF, Open Redirect, and Self-XSS Possible Exploitation through HackerOne SSO-SAML ###PoC### - Go to ; Use a browser window with clear cookies ## Summary: Upload Avatar option allows the user to upload image/* . Terms. This leads to Hello, Stored XSS in Post title, example: https://imgur. html According to the 7th Annual Hacker-Powered Security Report, Reflected XSS accounts for 10% of all bugs reported in ecommerce organizations, making it one of the top three vulnerability classes in that Summary : Stored attacks are those where the injected script is permanently stored on the target servers, such as in a database, in a message forum, visitor log, comment field, etc. ``` https:// / onload=%22prompt(1) ``` Thanks DRauschkolb ## Impact XSS vulnerabilities can be used to trick a web user into executing a malicious script, In this report, the researcher was able to demonstrate a Stored XSS vulnerability in our Message system on the Social Club website. to Twitter - 183 upvotes, $700; Chaining Bugs: Leakage of CSRF Hi. abritel. io/ that will result in permanent defacement/stored XSS of all the documentation pages on https . Thus enabling the upload of many file formats including SVG files (MIME type: image/svg+xml) SVG files are XML based Hi, As i analysed the application behavior and the security structure, i found out that the application is using "Greedy XSS Regex filter" against XSS and removes any the whole string Hi, I found HTML Injection on imgur. HackerOne In a follow-up to resolved report #221893, it was possible to achieve reflected XSS on `mercantile. **Description:** The server reads data directly from the I’m Rinkesh Patidar, a bug hunter, and that’s all the intro I need. 8. *Thanks to the 18F team for the great experience, fast fix, and the bounty!* This XSS was undetectable by the most XSS scanners due to WAF in place. #Description A favorites folder with an xss payload for a **Description:** Keycloak 8. uber. Due to a configuration in frontend, caching servers, it was possible for a researcher to use request smuggling to convert a page request into a cached redirect. com/gallery/Y5JUzv3, Thanks ## Impact steal cookies and session # Hello Ubuquiti, # Details I was able to upload an svg file to [here](https://community. 3. The issue has been rectified, as we removed the directory from the host. This type of attack can result in ## Background ## A Cross-Site Tracing (XST) attack involves the use of Cross-site Scripting (XSS) and the TRACE HTTP method. Write Blind I was able to Takeover Accounts Via Cache Poisoning (XSS) This was possible due to: 1. com javaScript security is very important, even more in portals where users store their personal data. Hackers: Learn how to write high-quality reports. This report demonstrates a specifically ### Summary When rendering markdown, links to designs are parsed using the following `link_reference_pattern`: https://gitlab. Web applications that allow users to store data are potentially exposed to this type 2000+ Top XSS reports from HackerOne - Free download as PDF File (. This XSS will work in Firefox,Chrome - Google and IE last version Reflected XSS attacks, also known as non-persistent attacks, occur when a malicious script is reflected off of a web application to the victim's browser. ## Impact The person viewing the image of XSS in `js-xss` with `onIgnoreTag` option. Account title of field is vulnerable to Html Injection which can lead an Hi! I found Dom based xss on this subdomain https://kb. Upload the PoC. Let me explain: I found a XSS when I send a image in the support chat and change the image name to some script. # Module **module name:** htmr **version:** 0. This was my first report, so it is a little mess. All reports' raw info stored in data. So, let’s get into it! This vulnerability lets me Discover and address blind XSS vulnerabilities effectively using the automated services of xss. Every script contains some info about how it works. ru/2017/09/devtwittercom-xss. I stumbled upon it many times when doing recon on bug bounty targets and decided to take a # Description Hi, i would like to report DOM-Based XSS that it's exactly like this one #882546, this one work just because the page /reblog/ID/OTHER_ID doesn't have a Hii Security Team , I am S Rahul MCEH(Metaxone Certified Ethical Hacker) and a Security Researcher I just checked your website and found Reflected XSS to Good XSS Clickjacking In This part is an analysis of real cases reported in Bug Bounty scenarios. org` with an AngularJS injection payload. details -- # Intro Since the founding of HackerOne, we have kept a steadfast commitment to disclosing security incidents because we believe that sharing security information far and wide is An XSS was reported combining AutoLinker and Markdown. It allows to execute JavaScript code embeded in the XLS sheet when data from the sheet are displayed in the Because of these properties, the UI becomes easily vulnerable to different types of code injection, most notably XSS. Our engineers deployed a fix that ### Description: first, it was a very good bug for me it starts when I was testing the form for I found a CSRF I sent it here #838778 I tested the form again and after few minutes I found that ## Summary: Hi security team members, Hope you are well and doing great :) I found a **Possible XSS vulnerability in `CUSTOM` App through the Button tag but I was not able to Browse public HackerOne bug bounty program statisitcs via vulnerability type. In particular, when viewing an openapi file, [openapi_viewer](https://gitlab. It also serves as a resource that enables you to search for reports regarding programs and # Summary: yelp. By taking advantage of the fact that '＜' characters are The researcher found an XSS vulnerability caused by query parameters not being properly sanitized before being displayed on the page. 0. When the installation was done, I saw a @ashketchum noticed that we changed our program policy to accept rich text editor-based XSS vulnerabilities and immediately got to testing. This is due to lack of This is a bypass of report #808287 Upload the attached file for the image of a contact, right click "Open image in new tab" and you will see the xss. Need bypass the CSP to trigger it ## Impact Cross This issue is a XSS affecting all Shopify stores that can be triggered via `windows. com/dashboard/admin` that can later be delivered through unique linkpop link. com/gitlab-org/gitlab/-/issues/345657) which handles the XSS in notes reported in Hackerone report [1398305](https We’ve been hunting on a private program on HackerOne for a couple weeks with a fair bit of success, but most findings have been medium-ish severity and nothing to write home about. 6 **npm The reporter has found an HTML injection that lead to XSS with several payloads. Previously, it was discovered that a certain ## Steps To Reproduce: Affected versions of Bootstrap package are vulnerable to Cross-site Scripting (XSS) in data-template, data-content and In Bootstrap before 3. Combining the three most common types of XSS, it Contribute to reddelexc/hackerone-reports development by creating an account on GitHub. com reflects the content of the cookie `guvo` in the html returned to the user. com/gitlab-org/gitlab/-/blob/v13. So I Or, a hacker reports an XSS vulnerability in a specific parameter, with a few example payloads. The POC also included a WAF bypass, Exploiting a vulnerability rooted in inadequate handling of query parameters within the `new. Scripts to update this file are written in Python 3 and require chromedriver and Chromium executables at PATH. Developers should attention to block SVG files or sanitize files before upload. In the Education and Science sector it has the A Cross-Site Scripting (XSS) vulnerability was found on a TikTok Ads endpoint via the "redirect" parameter. 12. An attacker can execute arbitrary script and thus steal cookie-based authentication credentials and launch ## Summary: Hi security team members, Hope you are well and doing great :) I found a **Possible XSS vulnerability in https://dashboard. com The payloads that work are ## Summary It has been identified that a known and previously reported stored XSS vulnerability is still possible to be exploited and abused in the recent version of Acronis Cyber Protect Top XSS reports from HackerOne: Bypass for #488147 enables stored XSS on https://paypal. This report has found by the following link DOM Based XSS in www. Go to (https://theacademy. readme. upserve. Despite the investment in security, and industry calls for better security practices earlier in On August 1, 2021 I decided to hunt a program on Hackerone — Redacted. The XSS exists due to the old version of DOMpurify used in swagger-ui that allows an attacker can I was able to submit a blind xss payload through the form which was triggered in backend ## Summary: I have discovered a blind stored cross site scripting vulnerability due to an insecure Attackers can trigger XSS by SVG files. page. One big thing Learn more about HackerOne. html` file, attackers can manipulate the URL query to insert `javascript:` Due to a configuration in frontend, caching servers, it was possible for a researcher to use request smuggling to convert a page request into a cached redirect. Remember, the more detail you provide, the easier it is for us to Very simple open redirect made more impactful by the lack of filtering javascript URIs. com/signin again to PayPal - 2612 upvotes, $20000; Stored XSS on Not all great vulnerability reports look the same, but many share these common features: Detailed descriptions of your discovery with clear, concise, reproducible steps or a working proof-of This lists the top XSS vulnerability reports submitted to HackerOne between 2000 and 2022. com website is affected by a cross-site scripting vulnerability, caused by an insecure 'message' event listener installed **Hi** Security Team instacart I'm Found Vulnerability **Cookie-Based Injection** It's may be possible to steal or manipulate session and cookies if attacker can injection **XSS** . By combining AutoLinker and Markdown one could trick the parser into breaking out of the current HTML attribute, resulting Hello, I found self xss your main domain. English. Log in A single host in the pilot environment exposed the Apache Tomcat `/jsp-examples` example directory. csv. . com/mz-survey The researcher discovered a URL parameter reflecting its value without being properly sanitized and was able to achieve reflected XSS. **Description:** Stored XSS, also known as persistent XSS, is the more damaging than non-persistent XSS. The issue allowed attackers to make internal Hi, Will you confirm the XSS vulnerability blocked by the CSP? On Nextcloud 19. playstation. It is important to note that this attack vector was only applicable via Internet Explorer. When not properly escaped an attacker can inject malicious In this report, the researcher identified a DOM-Based XSS vulnerability on `www. com/ ## Steps To Reproduce: 1. report. ### Summary I found a Stored-XSS in blob viewer when viewing a json file. If the cached redirect were Hello Semrush Team, In this report id ```311330```, I was filled duplicate and redirection url is fixed which made me feel happy as deserving bounty hunter gets a reward. com Description: I couldn't get xss but i was able to include videos on my profile and also i was able to redirect users to malicious websites POC (HTML Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF) are two distinct attack vectors, but when combined, they can significantly increase the impact of an attack. com/playlists/all-videos/). com/blog/web-security/cross-site-scripting-xss/) in https://olx. Go to this url and you'll see alert pop `https://www. pingone. 1-ee Hi, I would like to report DOM-based XSS in htmr. rockstargames. The report demonstrated a clever bypass of the escaping code we had @nokline and @bombon were able to utilize URL parser confusion in combination with reflected XSS under https://glassdoor. shopifycloud. According to RFC 2616, "TRACE allows the client to Slack allows users to upload files to their Workspace to facilitate sharing information between team members as well as with other workspaces. We thank imran_nisar Greetings, I've discovered a DOM-based XSS at ** ** **_Proof of concept:_** **1. Sign in Product security xss rce reports sql-injection csrf writeups bugbounty ssrf hackerone Linked to the report [https://hackerone. The Hacktivity is HackerOne's community feed that showcases hacker activity on HackerOne. so i uploaded an The reporter found a reflected XSS in the OAUTH2 login flow which could have allowed potential attackers to steal credentials or hijack accounts by sending a message to the victim containing Ali found a stored XSS vulnerability in the JavaScript implementation of workflow keywords on our Trac instance. Welcome to. Unlike many other XSS reports we typically receive, this one has Hi Team, I would like to report Stored XSS vulnerability in exceljs module. Background The Steam Chat client is a particularly interesting system to attack because it's built using a modern set of technologies with strong security characteristics. For example, most reflected and DOM-based XSS reports can contain just a short description and reproduction steps as they are well-known attack types. I saw their main domain was in scope REDACTED. com. HackerOne API. It allows attackers to insert malicious JavaScript payload into the page. com via PostMessage to HackerOne - 186 upvotes, $500; Stored XSS on reports. csv . - **XSS **Cross Site Scripting (XSS) / Moodle XSS ** **Summary : ** *Cross-site scripting (XSS) is a type of computer security vulnerability typically found in web applications. In addition, researcher found an endpoint which was http://blog. com/reports/1083376) I found a Some components are optional in a trivial report. Payload for bypass : ` Click Here ` # Steps A Cross-Site Scripting (XSS) vulnerability was found on a TikTok endpoint via the 'region' parameter, due to the reflection of user-supplied data without appropriate HTML escaping or The advanced vetting settings page is vulnerable to a Cross-Site Scripting (XSS) vulnerability by passing the unsanitized Program Name into a Markdown component, which expects sanitized The researcher demonstrated a vulnerability in Twitter's Jira instance where user supplied information was handled in an improper manner, rendering the application vulnerable to blind **Summary:** I've found a DOM-based XSS vulnerability in the website **help. Two disclossed Hackerone reports will be analyzed and a few tips to exploit/bypass postMessage Vulnerabilities will be shown. COM/. Click ## Summary: I've found an DOM Based XSS on homepage ## Steps To Reproduce: 1. ** Go to https:// / /home/troubleshoot. php/ccm/calendar/dialogs/event/add/save` is affected by Stored XSS due to lack of XSS has formed a significant proportion of the attacks on web apps in 2018. Login to # Summary With any in-app redirect - logic/open redirect, HTML or javascript injection it's possible to execute arbitrary code within Slack desktop apps. com/accounts/<ID>, and XSS Stored in PNG IDAT chunks using Hi Team, I found a XSS Reflected. XSS enables attackers to **Description:** Hello DoD team i found an reflected XSS that require user interaction, but it's suspicious due the reflected payload in the page So in this case i chain it with click-jacking The researcher found that menu titles were being rendered without proper escaping in the admin area. HackerOne has been measuring the top ten vulnerabilities reported on our platform for eight years. Like every bug hunter should, take a look at what’s in scope. html?lang=en **2. This was confirmed in the Hello, An XSS can be triggered if the user uploaded an image with an XSS vector as the file name, See the screenshot for more info, Thanks A stored XSS (cross-site scripting) was found on the internal larksuite helpdesk, which an attacker could have potentially used to obtain access to the internal helpdesk. Navigation Menu Toggle navigation. found dom xss on this subdomain eng. Check the PoC. **Description:** There is a cross-site scripting vulnerability found on cpanel application hosted on the website. LETS UNDERSTAND WHAT’S REFLECTED XSS FIRST ! Contribute to reddelexc/hackerone-reports development by creating an account on GitHub. com/# ` But this will work Tops of HackerOne reports. This can be combined with Hi, previously reported xss https://hackerone. com` loads it handles messages received from `postMessage` in the `_receiveMessageFromTransactClientService` method. hackerone. The program fixes the issue quickly and marks the report as Resolved. @bombon reported to us a web cache poisoning issue that led to caching of gdToken(Anti-CSRF token) across different Glassdoor pages and in some instances could be chained to perform **Summary:** The ` ` website is vulnerable to a cross-site scripting flaw if the server receives a crafted `X-Forwarded-Host` header. wordpress. com/GTAOnline/features/freemode`. ## ## Summary I read the issue [345657](https://gitlab. 4. Thanks again to the Twitter team for a quick response/bounty! **Summary:** The Marketo contact form available on the www. When such article gets published, and accessed on The HackerOne Top 10 Vulnerability Types. Skip to content. qa via parameter `backLink Learn more about HackerOne. com but I was not able to bypass a On January 9th, 2022, @kannthu discovered that the instance of Jamf Pro running on `https://jamfpro. In addition, with the Hi, I would like to report HTML Injection and possible cross site scripting (XSS) vulnerability using the MathML on Firefox. com/t5/media/gallerypage/user-id/559584). pdf), Text File (. com` has the old Swagger-UI exposed at `/classicapi/doc/`. fr/annonces ©2025 HackerOne All rights reserved. `js-xss` is used to prevent XSS on email templates previews but the custom `onIgnoreTag` function can be used to bypass this filter. However, after fixing Learn more about HackerOne. txt) or view presentation slides online. It's built on React, Hackers: Learn how to write high-quality reports. Log in The researcher found that one of our video players had a Reflected XSS vulnerability, and was able to demonstrate the vulnerability with a POC. It is the top attack vector in 3 of these 6 sectors. com/reports/107405 which is fixed, but i am able to bypass that fix. Sign in Product GitHub Copilot. XSS attacks occur when an ## Summary: Reflected cross-site scripting (or XSS) arises when an application receives data in an HTTP request and includes that data within the immediate response in an unsafe way. The value of this localStorage key is used to There is a stored XSS vulnerability in the Application List page for the Connections module in https://console-staging. Description: An HTML5 cross-origin resource sharing (CORS) policy controls whether and how An attacker can make a series of requests to https://uber. jpg 2. BugBountyHunter is a custom platform created by zseano designed to help you get involved in bug bounties and begin participating from the comfort of your **Hi Team Security @olx** I Found [Reflected XSS](https://www. We thank @cancerz for reporting this to our team. stripe. ** In the username field, add On July 24, 2021, @irisrumtub discovered it was possible to insert an XSS payload encoded in an SVG file by using `data:` url's in the admin's rich text editor. The top reports include stored and reflected XSS issues in websites and platforms like PayPal, From the HackerOne article “Step by Step: How to write a good vulnerability report”, this article briefly explains each component with additional sections required to create a good and detailed Tops of HackerOne reports. Normally, gnar_containerId is being ### Summary There exists XSS in swagger-ui version used in GitLab open API viewer. If the cached redirect were Like every bug hunter I began my journey by reading security writeups, books ,Hackerone reports & Solving Labs. The script is activated through a link, > NOTE! Thanks for submitting a report! Please replace *all* the (parenthesized) sections below with the pertinent details. Attackers can target A stored XSS issue was reported on “LinkedIn Article” where a malicious JavaScript (JS) payload can be embedded in URL field of iframe. This one was honestly pretty Hello team, I found unrestricted file upload via avatar in https://accounts. Hi Team, I want to report a File upload XSS in your Image upload functionality of Apps in mopub. 1 and 4. com sites is vulnerable to stored XSS via a crafted payload. shopify. Skip to main content. com** that persists via a localStorage key **lastArticleHref**. loading. ## Platform(s) Affected: ## Report Summary: When `transact. com/resources/ and https://resources. The issue was caused by using unescaped user input to generate a delete ## Summary: Good day team, I found a self-xss due to the image url of recommendations in your reviewer profile that can be exploited via XSSJacking techniques. Register.
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