CVE-2025-11902 is a SQL injection vulnerability identified in the ChanCMS content management system, versions 3.3.0 through 3.3.2. The flaw exists in the findField function located at /cms/article/findField, where the 'cid' parameter is improperly sanitized, allowing attackers to inject malicious SQL code. This injection can be exploited remotely without requiring authentication or user interaction, making it accessible to a wide range of threat actors. The vulnerability's CVSS 4.0 score is 5.3 (medium severity), reflecting its moderate impact and ease of exploitation. The attack vector is network-based with low attack complexity and no privileges or user interaction needed. Exploiting this vulnerability could allow attackers to read, modify, or delete database contents, potentially leading to data breaches, unauthorized data manipulation, or denial of service. The vendor has not responded to disclosure attempts, and no official patches are currently available, though public exploit code has been released, increasing the urgency for defensive measures. The vulnerability affects the confidentiality, integrity, and availability of data managed by ChanCMS installations. Given ChanCMS's use in various organizations, especially those managing content-heavy websites, exploitation could disrupt services and compromise sensitive information.

For European organizations using ChanCMS versions 3.3.0 to 3.3.2, this vulnerability poses a significant risk to data confidentiality and integrity. Attackers could extract sensitive information from databases, modify content, or disrupt website availability, potentially damaging organizational reputation and causing operational downtime. Industries relying on ChanCMS for public-facing websites or internal portals may face data breaches or defacement. The lack of vendor response and available patches increases exposure time, heightening risk. Additionally, regulatory frameworks such as GDPR impose strict data protection requirements; exploitation leading to data leakage could result in legal penalties and loss of customer trust. Organizations in sectors like media, education, and government, which often use CMS platforms, may be particularly vulnerable. The medium severity score suggests a moderate but actionable threat, especially given the public availability of exploits and remote attack vector without authentication.

1. Immediately implement strict input validation and sanitization on the 'cid' parameter at the application or web server level to block malicious SQL payloads. 2. Deploy or update Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting the vulnerable endpoint. 3. Monitor web server and database logs for unusual query patterns or repeated access to /cms/article/findField with suspicious parameters. 4. Restrict database user permissions to the minimum necessary to limit potential damage from injection attacks. 5. Isolate or segment the CMS environment to reduce lateral movement if exploitation occurs. 6. Engage in active threat hunting for indicators of compromise related to this vulnerability. 7. Prepare for patch deployment by testing updates once the vendor releases a fix; consider alternative CMS solutions if vendor support remains absent. 8. Educate developers and administrators about secure coding practices to prevent similar injection flaws. 9. Consider temporary disabling or restricting access to the vulnerable function if feasible until a patch is available.