CVE-2025-66036
📋 TL;DR
Retro platform versions before 2.4.7 contain a cross-site scripting (XSS) vulnerability in input handling that allows attackers to inject malicious scripts. When exploited, this could enable session hijacking, credential theft, or defacement affecting all users who interact with vulnerable input fields. The vulnerability affects any Retro deployment running versions below 2.4.7.
💻 Affected Systems
- Retro
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals admin session cookies, gains full administrative access to the platform, exfiltrates all user data, and deploys persistent malware to all users.
Likely Case
Attacker steals user session cookies to hijack accounts, performs phishing attacks via the platform, or defaces content visible to other users.
If Mitigated
Script execution is blocked by modern browser security features like Content Security Policy, limiting impact to basic defacement.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity, especially when unauthenticated input is accepted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.7
Vendor Advisory: https://github.com/Anjaliavv51/Retro/security/advisories/GHSA-gvv6-p6h6-2vj2
Restart Required: Yes
Instructions:
1. Backup your current Retro installation and database. 2. Download version 2.4.7 from the official repository. 3. Replace all files with the patched version. 4. Restart the web server/service. 5. Verify functionality.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd a restrictive CSP header to block inline script execution and limit script sources.
Add to web server config: Content-Security-Policy: default-src 'self'; script-src 'self'
Input Sanitization Filter
allDeploy a web application firewall or middleware to sanitize all user input before processing.
Configure WAF rules to filter <script>, javascript:, and other XSS payload patterns
🧯 If You Can't Patch
- Implement strict input validation on all user-controlled fields, rejecting any HTML/script content.
- Deploy a web application firewall with XSS protection rules in blocking mode.
🔍 How to Verify
Check if Vulnerable:
Test input fields with basic XSS payloads like <script>alert('XSS')</script> and observe if script executes.Check Version:
Check Retro configuration files or admin panel for version number, typically in package.json or similar manifest.Verify Fix Applied:
After patching, retest with XSS payloads to confirm they are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual long input strings containing script tags or JavaScript code in request logs
- Multiple failed login attempts from new locations following suspicious input
Network Indicators:
- HTTP requests containing script tags, javascript: URIs, or encoded XSS payloads
- Unexpected outbound connections to external domains following user input
SIEM Query:
source="web_logs" AND (uri="*<script>*" OR uri="*javascript:*" OR user_agent="*<script>*")