ChanCMS CVE-2025-11903

No vendor-released patch is available at this time due to the vendor's lack of response to disclosure. Organizations running ChanCMS 3.3.2 or earlier should immediately implement input validation and parameterized query controls at the application layer to neutralize the SQL injection vector in the /cms/article/update endpoint. A temporary compensating control is to restrict network access to the /cms/article/update endpoint via Web Application Firewall (WAF) rules that block requests with suspicious SQL metacharacters in the cid parameter (such as single quotes, double dashes, UNION keywords), though this may cause false positives and does not address all injection variants. Alternatively, disable the article update feature entirely if not essential to operations, or restrict update functionality to administrative accounts only and implement strict role-based access controls. Monitor database query logs for anomalous SQL patterns targeting the article table. The recommended long-term solution is to migrate to an actively maintained CMS fork or alternative system that includes SQL injection defenses, as the original ChanCMS project appears abandoned.