Discovering Critical Security Vulnerabilities: My Journey into Microsoft’s Release Plans Subdomain

8 min readJun 14, 2024


The Beginning

One quiet afternoon, I found myself exploring the intricate web of Microsoft’s online services. Driven by curiosity and a passion for cybersecurity, I decided to delve into a less commonly traversed subdomain: Little did I know, this exploration would lead to the discovery of two significant vulnerabilities that could potentially impact numerous users.

The Exploration

Navigating to Release Plans

My journey began by navigating to the Release Plans site. I logged in with my email address and proceeded to explore the features. Here’s a step-by-step account of my discovery process:

  1. Login:
  2. Navigate to
  3. Login with your email address.

Exploring Features:

Intercepting with BurpSuite:

  • Using BurpSuite, intercept the request when adding a note.
  • Change the description of the note to include XSS and HTML Injection code.
  • Send the request and check the plan again with your note.

To my surprise, the injected code executed flawlessly, confirming the presence of both Stored Cross-Site Scripting (XSS) and HTML Injection vulnerabilities.

The Discovery

Stored Cross-Site Scripting (XSS)

Stored XSS occurs when user-supplied data is stored persistently on a target application’s server without proper validation or sanitization. In this case, I discovered that user input fields on are vulnerable to storing malicious scripts, which can then be executed within the browsers of other users accessing the same pages.


  • Attackers could inject malicious scripts into the application, leading to the theft of sensitive user information, session hijacking, or the manipulation of page content to deceive users into performing unintended actions.

HTML Injection

HTML Injection vulnerabilities occur when an application fails to properly sanitize user-supplied HTML input, allowing attackers to inject arbitrary HTML or JavaScript code into web pages viewed by other users.


  • Exploiting HTML Injection vulnerabilities can lead to various attacks, including defacement of web pages, injection of phishing content, redirection to malicious websites, and the theft of sensitive information.

Additional Risk Factor

During my exploration, I identified a potential risk where malicious actors could attempt to brute force the “release notes hash ID” to inject XSS and HTML Injection payloads into the community release notes system. This could enable attackers to propagate their malicious content across the community, compromising the trust and security of the platform.

Potential Exploitation Scenarios

  • Session Hijacking: Attackers could exploit the vulnerabilities to steal users’ session cookies, gaining unauthorized access to their accounts.
  • Phishing Attacks: Malicious actors could replace legitimate content with phishing pages, tricking users into divulging sensitive information or downloading malicious files.
  • Content Manipulation: Attackers could modify entire web pages to distribute malware or propagate their malicious agenda, posing significant risks to user trust and security.

Firing Up the #IBRAHIMXSS Tool

With these findings, I decided to fire up my trusted #IBRAHIMXSS Tool to further validate the vulnerabilities. I saved the request from my notes because my tool support testing POST requests with option — post and replaced the relevant text field with my XSS payloads. When I executed the request, my screen was flooded with hundreds of XSS popups, serving as undeniable proof of the vulnerabilities’ existence and proof that my tool doesnt’t give any false positive results.


My journey to uncover these vulnerabilities highlights the critical importance of continuous security assessments. Using my #IBRAHIMXSS Tool, I was able to efficiently identify and validate Stored XSS and HTML Injection vulnerabilities across multiple Microsoft subdomains. This tool has proven to be an invaluable asset in my security toolkit, making the process of vulnerability detection both quick and effective.

By addressing these issues promptly, Microsoft can enhance the security of its applications, protect its users, and maintain trust in its brand. For further clarity, I have attached images and videos illustrating the exploitation of these vulnerabilities. If you have any questions or require additional information, feel free to contact me on my Linkedin profile:

Proof of Concept:

#IBRAHIMXSS Tool Presentation

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Discover the cutting-edge features of #IBRAHIMXSS:
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✅ Zero False Positives
💡 Unique Innovation
🎯 Flexible Detection Modes
🔗 POST and GET Requests
🌐 DOM-Based XSS
🔍 Path-Based Analysis
📱 JSON Web Apps
📊 Exportable Reports
🔓 WAF Bypass
🕵️‍♂️ Stealth Mode
💼 Efficiency
💥 Over 2500 Encoded Payloads
🛠️ Lab-Tested and Field-Ready
🔄 Multi-threading
⏳ Customizable Delay
⚡️ Scans 2500 payloads on 1 URL in only 15 seconds! ⚡️🔥
🔌 XSS into all kinds of extensions
🔒 Secure and Reliable
🌟 Continuous Updates
📈 High Performance
🔄 Automated Scanning
🔍 Accurate Detection Algorithms
🔧 Easy Configuration
📂 Support for Various Web Technologies
🚀 Rapid Deployment
🔎 Advanced Search and Filter Options
🔧 Customizable Payloads

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📊 Exportable Reports

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⏳ Customizable Delay

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⚡️ Scans 2500 Payloads on 1 URL in Only 15 Seconds! ⚡️🔥

Achieve unparalleled speed with the ability to scan 2500 payloads on 1 URL in just 15 seconds. This blazing-fast performance sets a new standard in web security, enabling rapid and thorough assessments.

🔌 XSS into all kinds of extensions🔌

Expand your security coverage with XSS detection into all kinds of URL extensions. The #IBRAHIMXSS Tool supports testing XSS vulnerabilities in various URL extensions, such as changing login.php to test payloads like {payload}.php. This ensures comprehensive testing across different file types and URL structures.

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📈 High Performance📈

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🔄 Automated Scanning🔄

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🔍 Accurate Detection Algorithms🔍

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🔧 Easy Configuration🔧

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📂 Support for Various Web Technologies📂

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🚀 Rapid Deployment🚀

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🔎 Advanced Search and Filter Options🔎

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🔧 Customizable Payloads🔧

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Proven Performance in Bug Bounty Platforms

The #IBRAHIMXSS Tool has been proven on tens of bug bounty platforms, including Microsoft. In just 2 months, I discovered over 30 XSS vulnerabilities using this tool. Imagine the potential earnings: bug bounty platforms pay between $500 and $3000 for XSS findings. By investing a modest amount between $20 to $70 in this tool, you can earn tens of thousands of dollars. It’s a smart investment for passive income. Simply collect URLs, run the tool overnight, and wake up to results in the morning. That’s how I’ve been doing it, and now you can too.

Remember how many bug bounty platforms there are, and if you find just one XSS vulnerability on each of these platforms, you could earn over $100k in a year by focusing clearly and testing all possible inputs and fields. You can be confident that if there is an XSS vulnerability, this tool will find it. You will be sure that it will find it.

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Deploying an alert box in a web app is like having a tiny pop-up comedian shout 'Surprise!' whenever you least expect it!