CVE-2025-11903
📋 TL;DR
This SQL injection vulnerability in ChanCMS allows remote attackers to execute arbitrary SQL commands by manipulating the 'cid' parameter in the article update function. All ChanCMS installations up to version 3.3.2 are affected. Successful exploitation could lead to data theft, modification, or deletion.
💻 Affected Systems
- yanyutao0402 ChanCMS
📦 What is this software?
Chancms by Chancms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data exfiltration, modification, or deletion; potential privilege escalation to administrative access; possible remote code execution if database configuration permits.
Likely Case
Unauthorized access to sensitive article data, user information, or configuration settings; potential for data manipulation or deletion in affected tables.
If Mitigated
Limited impact with proper input validation and parameterized queries in place; database permissions restricting write access would reduce damage.
🎯 Exploit Status
Exploit details are publicly available in GitHub repositories. The vulnerability requires access to the article update function, which typically requires authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider migrating to alternative CMS or implementing workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to sanitize the 'cid' parameter before processing
Implement parameterized queries or prepared statements in /cms/article/update function
Add input validation to ensure 'cid' contains only numeric values
Web Application Firewall Rules
allBlock SQL injection patterns targeting the article update endpoint
Add WAF rule: deny requests to /cms/article/update with SQL keywords in parameters
Implement rate limiting on the vulnerable endpoint
🧯 If You Can't Patch
- Isolate the ChanCMS instance behind a reverse proxy with strict input filtering
- Implement database-level controls: restrict application database user permissions to minimum required
🔍 How to Verify
Check if Vulnerable:
Check if ChanCMS version is 3.3.2 or earlier. Test the /cms/article/update endpoint with SQL injection payloads in the 'cid' parameter.Check Version:
Check CMS version in admin panel or configuration filesVerify Fix Applied:
Verify that parameterized queries are implemented in the update function. Test with SQL injection payloads to confirm they are blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed login attempts followed by article update requests
- Requests to /cms/article/update with suspicious 'cid' parameter values
Network Indicators:
- Unusual database query patterns from application server
- SQL syntax in HTTP POST parameters to vulnerable endpoint
SIEM Query:
source="web_logs" AND uri="/cms/article/update" AND (param="cid" AND value MATCHES "(?i)(union|select|insert|update|delete|drop|--|#|;)")🔗 References
- https://github.com/NarcherAlter/Security_Note/blob/main/Vulnerability_Discovery/ChanCMSv3.3.2.md#111
- https://github.com/NarcherAlter/Security_Note/blob/main/Vulnerability_Discovery/ChanCMSv3.3.2.md#cmsarticleupdate
- https://vuldb.com/?ctiid.328913
- https://vuldb.com/?id.328913
- https://vuldb.com/?submit.670271
