CVE-2023-29212
📋 TL;DR
This vulnerability allows any user with edit rights in XWiki to execute arbitrary Groovy, Python, or Velocity code due to improper escaping in the included documents edit panel. This leads to full access to the XWiki installation, including potential remote code execution. All XWiki installations with users having edit permissions are affected.
💻 Affected Systems
- XWiki Commons
- XWiki Platform
📦 What is this software?
Xwiki by Xwiki
Xwiki by Xwiki
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the XWiki server with attacker gaining full administrative access, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Authenticated users with edit rights can execute arbitrary code, leading to privilege escalation, data manipulation, and potential server takeover.
If Mitigated
If proper access controls limit edit rights to trusted administrators only, impact is reduced to potential insider threat scenarios.
🎯 Exploit Status
Exploitation requires authenticated user with edit rights. The vulnerability is straightforward to exploit once an attacker has edit access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: XWiki 14.4.7 or 14.10
Vendor Advisory: https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-c5f4-p5wv-2475
Restart Required: Yes
Instructions:
1. Backup your XWiki installation. 2. Upgrade to XWiki 14.4.7 or 14.10. 3. Restart the XWiki application server. 4. Verify the fix by checking the version.
🔧 Temporary Workarounds
Restrict Edit Permissions
allTemporarily remove edit permissions from all non-administrative users to prevent exploitation.
Edit XWiki rights settings to restrict edit permissions to administrators only
Disable Included Documents Feature
allDisable or restrict access to the included documents edit panel if not required.
Modify XWiki configuration to disable document inclusion features
🧯 If You Can't Patch
- Implement strict access controls to limit edit permissions to absolutely necessary users only
- Deploy web application firewall (WAF) rules to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check if your XWiki version is below 14.4.7 or 14.10 and if users have edit permissions.Check Version:
Check XWiki administration panel or view the XWiki version in the web interface footer.Verify Fix Applied:
Verify the XWiki version is 14.4.7 or 14.10 or higher after patching.📡 Detection & Monitoring
Log Indicators:
- Unusual Groovy/Python/Velocity code execution in logs
- Multiple failed edit attempts followed by successful code execution
- Administrative actions from non-admin users
Network Indicators:
- Unusual POST requests to document edit endpoints with code payloads
SIEM Query:
source="xwiki.log" AND ("Groovy" OR "Python" OR "Velocity") AND "execution"🔗 References
- https://github.com/xwiki/xwiki-platform/commit/22f249a0eb9f2a64214628217e812a994419b69f#diff-a51a252f0190274464027342b4e3eafc4ae32de4d9c17ef166e54fc5454c5689R214-R217
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-c5f4-p5wv-2475
- https://jira.xwiki.org/browse/XWIKI-20293
- https://github.com/xwiki/xwiki-platform/commit/22f249a0eb9f2a64214628217e812a994419b69f#diff-a51a252f0190274464027342b4e3eafc4ae32de4d9c17ef166e54fc5454c5689R214-R217
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-c5f4-p5wv-2475
- https://jira.xwiki.org/browse/XWIKI-20293
