CVE-2025-32069
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in the Mediawiki Wikibase Media Info Extension caused by improper input validation. Attackers can inject malicious scripts that execute in users' browsers when they view specially crafted content. This affects Mediawiki installations using the Wikibase Media Info Extension versions 1.39 through 1.43.
💻 Affected Systems
- Mediawiki - Wikibase Media Info Extension
⚠️ 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
Attackers could steal session cookies, perform actions as authenticated users, deface pages, or redirect users to malicious sites, potentially compromising user accounts and sensitive data.
Likely Case
Attackers inject malicious JavaScript to steal session cookies or perform limited actions in the context of logged-in users viewing affected pages.
If Mitigated
With proper Content Security Policy (CSP) headers and input sanitization, impact is reduced to limited script execution within the page context.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity. The vulnerability allows unauthenticated attackers to inject scripts that execute when users view affected content.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.43.1 or later
Vendor Advisory: https://phabricator.wikimedia.org/T387691
Restart Required: No
Instructions:
1. Update the Wikibase Media Info Extension to version 1.43.1 or later. 2. For Mediawiki 1.39-1.42, apply the patch from the gerrit reference. 3. Clear any caches. 4. Verify the fix by testing input validation.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources and mitigate XSS impact
Add to web server config or Mediawiki LocalSettings.php: Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval';"
Consider implementing stricter CSP policies based on your needs
Disable Wikibase Media Info Extension
allTemporarily disable the vulnerable extension until patching is possible
Edit LocalSettings.php and comment out or remove: wfLoadExtension('WikibaseMediaInfo');
Restart web server if required
🧯 If You Can't Patch
- Implement strict Content Security Policy headers to limit script execution
- Enable Mediawiki's built-in XSS protection features and review user input validation
🔍 How to Verify
Check if Vulnerable:
Check the Wikibase Media Info Extension version in Mediawiki's Special:Version page or extension directoryCheck Version:
Check Mediawiki Special:Version page or examine extension.json in extensions/WikibaseMediaInfo/Verify Fix Applied:
Test input fields that previously accepted script tags - they should now be properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in page edit logs
- Multiple failed input validation attempts
- Suspicious user agent strings in access logs
Network Indicators:
- Unexpected external script loads from Mediawiki pages
- Suspicious POST requests with script content
SIEM Query:
source="mediawiki_access.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")