CVE-2025-11941 is a path traversal vulnerability identified in the e107 Content Management System (CMS), specifically affecting versions 2.3.0 through 2.3.3. The vulnerability exists in the Avatar Handler component, within the /e107_admin/image.php file, where the 'multiaction[]' parameter is improperly sanitized. An attacker can remotely manipulate this parameter to traverse directories on the server, potentially accessing sensitive files outside the intended directory scope. The vulnerability does not require authentication or user interaction, increasing its risk profile. The CVSS v4.0 score of 5.3 reflects a medium severity, considering the attack vector is network-based with low attack complexity but requiring low privileges. The vulnerability impacts confidentiality and integrity, as unauthorized file access could disclose sensitive data or allow modification of files. The vendor was notified early but has not issued a patch or response, and exploit code has been publicly disclosed, increasing the risk of exploitation. No known active exploitation has been observed to date. The lack of vendor response and patch availability means organizations must rely on alternative mitigation strategies until an official fix is released.

For European organizations using e107 CMS, this vulnerability poses a risk of unauthorized disclosure of sensitive information stored on web servers, including configuration files, user data, or other critical assets. Attackers exploiting this flaw could gain insights into system configurations or extract data that could facilitate further attacks. Integrity could also be compromised if attackers modify files, potentially defacing websites or injecting malicious content. The vulnerability's remote exploitability without authentication increases the attack surface, especially for publicly accessible CMS installations. This could lead to reputational damage, regulatory non-compliance (e.g., GDPR breaches if personal data is exposed), and operational disruptions. Organizations relying on e107 CMS for public-facing websites or internal portals should consider this a significant risk until remediated.

Since no official patch is currently available, European organizations should implement the following specific mitigations: 1) Apply strict input validation and sanitization on the 'multiaction[]' parameter at the web server or application firewall level to block path traversal patterns (e.g., '../'). 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting /e107_admin/image.php. 3) Restrict file system permissions for the web server user to limit access to sensitive directories and files, minimizing the impact of traversal. 4) Monitor web server logs for unusual access patterns or attempts to exploit path traversal. 5) Consider temporarily disabling or restricting access to the Avatar Handler functionality if feasible. 6) Maintain regular backups of website data to enable recovery in case of compromise. 7) Engage with the e107 community or security forums for updates or unofficial patches. 8) Plan for an upgrade or migration to a more secure CMS platform if vendor support remains absent.