CVE-2022-29251
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in XWiki Platform's Flamingo Theme UI. Attackers can inject malicious scripts via the 'newThemeName' form field, potentially compromising user sessions or performing unauthorized actions. Users running XWiki Platform versions 6.2.4 through 12.10.10, 13.0.0 through 13.4.6, or 13.5.0 through 13.10.2 are affected.
💻 Affected Systems
- XWiki Platform
📦 What is this software?
Xwiki by Xwiki
Xwiki by Xwiki
Xwiki by Xwiki
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, perform account takeover, deface the wiki, or execute arbitrary actions as authenticated users.
Likely Case
Session hijacking, credential theft, or unauthorized content modification by tricking users into visiting malicious links.
If Mitigated
Limited impact with proper input validation and output encoding in place, though the vulnerability still exists.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious link) and access to the theme customization interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 12.10.11, 14.0-rc-1, 13.4.7, or 13.10.3
Vendor Advisory: https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vmhh-xh3g-j992
Restart Required: Yes
Instructions:
1. Identify your XWiki version. 2. Upgrade to patched version: 12.10.11, 14.0-rc-1, 13.4.7, or 13.10.3. 3. Restart XWiki service. 4. Verify fix by checking version.
🔧 Temporary Workarounds
Manual Wiki Page Edit
allEdit the FlamingoThemesCode.WebHomeSheet wiki page to add proper input validation/sanitization as suggested in advisory.
Access wiki editor, navigate to FlamingoThemesCode.WebHomeSheet, apply security fixes from advisory
🧯 If You Can't Patch
- Restrict access to FlamingoThemesCode.WebHomeSheet page to trusted administrators only
- Implement web application firewall (WAF) rules to block XSS payloads in theme name parameters
🔍 How to Verify
Check if Vulnerable:
Check XWiki version against affected ranges. Verify if FlamingoThemesCode.WebHomeSheet page exists and contains vulnerable code.Check Version:
Check XWiki administration panel or view page source for version informationVerify Fix Applied:
After patching, verify version is 12.10.11+, 14.0-rc-1+, 13.4.7+, or 13.10.3+. Test theme creation with XSS payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual theme creation/modification activity
- Requests containing script tags in theme name parameters
Network Indicators:
- HTTP requests with JavaScript payloads in 'newThemeName' parameter
SIEM Query:
web.url:*FlamingoThemesCode* AND (web.param:*<script>* OR web.param:*javascript:* OR web.param:*onerror=*)🔗 References
- https://github.com/xwiki/xwiki-platform/commit/bd935320bee3c27cf7548351b1d0f935f116d437
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vmhh-xh3g-j992
- https://jira.xwiki.org/browse/XWIKI-19294
- https://github.com/xwiki/xwiki-platform/commit/bd935320bee3c27cf7548351b1d0f935f116d437
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vmhh-xh3g-j992
- https://jira.xwiki.org/browse/XWIKI-19294
