CVE-2025-11941 is a path traversal vulnerability identified in the e107 CMS, specifically affecting versions 2.3.0 through 2.3.3. The flaw exists in the Avatar Handler component within the file /e107_admin/image.php, where the multiaction[] parameter is improperly sanitized. This allows an attacker to craft malicious requests that manipulate file paths, enabling traversal outside the intended directory structure. The vulnerability can be exploited remotely without user interaction, but requires low-level privileges, indicating that some form of authentication or limited access is necessary. The path traversal could allow attackers to read or potentially modify arbitrary files on the server, which may lead to information disclosure or limited integrity compromise. Although no known exploits are currently active in the wild, exploit code has been publicly disclosed, increasing the risk of exploitation. The vendor was notified but has not responded or provided patches, leaving users reliant on mitigations or upgrades. The CVSS 4.0 base score is 5.3 (medium), reflecting the moderate impact and ease of exploitation. The vulnerability does not affect confidentiality or availability to a critical extent but poses a tangible risk to the integrity and confidentiality of server files. This vulnerability is particularly relevant for organizations using e107 CMS for web content management, especially those exposing the administrative interface to the internet.

For European organizations, this vulnerability poses a moderate risk primarily to the confidentiality and integrity of web server files managed by e107 CMS. Attackers exploiting this flaw could access sensitive configuration files, user data, or other critical resources stored on the server, potentially leading to data breaches or further compromise. While the vulnerability does not directly enable remote code execution or denial of service, unauthorized file access can facilitate lateral movement or privilege escalation. Organizations relying on e107 CMS for public-facing websites or intranet portals may face reputational damage and regulatory consequences if sensitive data is exposed. The impact is heightened in sectors with strict data protection requirements such as finance, healthcare, and government. Additionally, the lack of vendor response and absence of patches increases the window of exposure. European entities with limited cybersecurity resources may struggle to implement effective mitigations, increasing their risk profile.

1. Restrict access to the /e107_admin/image.php endpoint by IP whitelisting or VPN-only access to limit exposure to trusted administrators. 2. Deploy web application firewalls (WAFs) with custom rules to detect and block path traversal attempts targeting the multiaction[] parameter. 3. Conduct thorough input validation and sanitization on all parameters, especially multiaction[], to prevent traversal sequences such as ../ or encoded variants. 4. Monitor web server logs for anomalous requests containing suspicious path traversal patterns and respond promptly. 5. Isolate the CMS environment with strict file system permissions to minimize the impact of unauthorized file access. 6. Consider upgrading to a newer, unaffected CMS version if available or migrating to alternative platforms with active security support. 7. Implement network segmentation to separate administrative interfaces from public-facing services. 8. Educate administrators about the risks and signs of exploitation attempts. 9. Regularly back up critical data and configuration files to enable recovery in case of compromise. 10. Engage with the e107 community or security forums to track any emerging patches or advisories.