CVE-2024-47847
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in the Mediawiki Cargo extension where user input isn't properly sanitized before being displayed in web pages. Attackers can inject malicious scripts that execute in victims' browsers when they view compromised pages. This affects Mediawiki installations using Cargo extension versions from 3.6.X before 3.6.1.
💻 Affected Systems
- Mediawiki Cargo extension
📦 What is this software?
Cargo by Mediawiki
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, deface websites, or redirect users to malicious sites, potentially compromising entire user accounts and administrative access.
Likely Case
Attackers inject malicious JavaScript to steal session cookies or credentials from users viewing compromised pages, leading to account takeover and unauthorized actions.
If Mitigated
With proper input validation and output encoding, the impact is limited to failed injection attempts with no successful exploitation.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity, though specific exploitation details aren't publicly documented for this CVE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.6.1
Vendor Advisory: https://phabricator.wikimedia.org/T368628
Restart Required: No
Instructions:
1. Update the Cargo extension to version 3.6.1 or later. 2. Use Mediawiki's extension update mechanism or manually replace the extension files. 3. Clear any caches if applicable.
🔧 Temporary Workarounds
Input Validation Filter
allImplement additional input validation to sanitize user input before processing by Cargo extension.
Content Security Policy
allImplement strict Content Security Policy headers to mitigate XSS impact by restricting script execution.
🧯 If You Can't Patch
- Disable the Cargo extension if not essential for operations
- Implement web application firewall rules to block XSS payload patterns
🔍 How to Verify
Check if Vulnerable:
Check the Cargo extension version in Mediawiki's Special:Version page or examine the extension's version file.Check Version:
Check Mediawiki's Special:Version page or examine extensions/Cargo/extension.json for version numberVerify Fix Applied:
Confirm Cargo extension version is 3.6.1 or later and test input fields for proper sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in user input logs
- Multiple failed input validation attempts
Network Indicators:
- HTTP requests containing suspicious script patterns or encoded payloads
SIEM Query:
web_logs WHERE url CONTAINS '<script' OR url CONTAINS 'javascript:' OR body CONTAINS suspicious_encoding_patterns🔗 References
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1063804
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1063806
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1063827
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1063831
- https://phabricator.wikimedia.org/T368628
- https://phabricator.wikimedia.org/T372211
