CVE-2025-15143 identifies a SQL injection vulnerability in EyouCMS, a content management system, affecting versions 1.7.0 through 1.7.6. The flaw exists in an unspecified function within the /application/admin/logic/FilemanagerLogic.php file, part of the Backend Template Management component. The vulnerability is triggered by manipulating the 'content' parameter, which is not properly sanitized before being incorporated into SQL queries. This allows an attacker with authenticated high-level privileges to inject arbitrary SQL commands remotely, potentially leading to unauthorized data access, modification, or deletion. The vulnerability does not require user interaction but does require authentication with elevated privileges, limiting the attack surface to insiders or compromised accounts. The vendor was notified early but has not responded or issued a patch, and a public exploit has been released, increasing the risk of exploitation. The CVSS 4.0 base score is 5.1 (medium severity), reflecting network attack vector, low complexity, no user interaction, but requiring high privileges and limited impact on confidentiality, integrity, and availability. No known active exploitation has been reported yet. The vulnerability highlights the importance of input validation and secure coding practices in CMS backend modules that manage templates and files.

The impact of CVE-2025-15143 primarily affects the confidentiality, integrity, and availability of data managed by EyouCMS installations. Successful exploitation allows attackers with high-level authenticated access to execute arbitrary SQL queries, which can lead to unauthorized data disclosure, data tampering, or deletion. This can compromise website content, user data, and potentially backend database integrity. For organizations relying on EyouCMS for web content management, this could result in defacement, data breaches, or service disruption. Since exploitation requires authenticated high privileges, the threat is more significant in environments with weak internal access controls or where credentials may be compromised. The public availability of an exploit increases the risk of targeted attacks, especially against organizations slow to patch or mitigate. The lack of vendor response and patch availability prolongs exposure. Overall, the vulnerability poses a moderate risk but can have serious consequences if leveraged in combination with other vulnerabilities or insider threats.

To mitigate CVE-2025-15143, organizations should first verify if they are running affected versions (1.7.0 to 1.7.6) of EyouCMS and plan immediate upgrades once a vendor patch is available. In the absence of an official patch, implement the following practical measures: 1) Restrict backend access to trusted administrators only, enforcing strong authentication and role-based access controls to limit high privilege accounts. 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious SQL injection payloads targeting the 'content' parameter in the FilemanagerLogic.php endpoint. 3) Conduct code review and apply manual sanitization or parameterized queries in the vulnerable function if source code access is available. 4) Monitor logs for unusual database query patterns or failed login attempts that could indicate exploitation attempts. 5) Isolate the CMS backend from public networks if possible, using VPN or IP whitelisting to reduce attack surface. 6) Educate administrators on the risks of SQL injection and the importance of credential security to prevent privilege escalation. These targeted mitigations can reduce the risk until an official patch is released.