The vulnerability identified as CVE-2025-13382 affects the Frontend File Manager Plugin developed by nmedia for WordPress, present in all versions up to and including 23.4. It is classified as an Insecure Direct Object Reference (IDOR) vulnerability under CWE-639, which occurs when the application fails to validate user authorization before processing requests involving user-controlled keys or identifiers. Specifically, the plugin's REST API endpoint '/wpfm/v1/file-rename' does not verify whether the authenticated user owns the file they attempt to rename via the 'fileid' parameter. As a result, any authenticated user with at least Subscriber-level privileges can rename files uploaded by other users, potentially disrupting content integrity or causing confusion. The vulnerability has a CVSS v3.1 base score of 4.3, indicating medium severity, with an attack vector of network (remote), low attack complexity, requiring privileges (authenticated user), no user interaction, and unchanged scope. The impact is limited to integrity, with no direct confidentiality or availability effects. No patches or fixes are currently linked, and no exploits have been reported in the wild. This vulnerability highlights a common authorization bypass issue in RESTful APIs where ownership checks are insufficient or missing, emphasizing the need for robust access control mechanisms in multi-user content management systems.

For European organizations, this vulnerability poses a risk primarily to the integrity of web content managed via WordPress sites using the affected plugin. Unauthorized file renaming could lead to content mismanagement, defacement, or disruption of workflows, potentially damaging brand reputation or user trust. While it does not expose sensitive data or cause service outages directly, attackers could leverage this flaw to manipulate files in a way that facilitates further attacks or social engineering. Organizations in sectors relying heavily on WordPress for digital content delivery—such as media, education, and e-commerce—may experience operational disruptions. The medium severity score reflects the limited scope but tangible risk of unauthorized modifications. Since exploitation requires authenticated access, insider threats or compromised low-privilege accounts are the most probable attack vectors. The lack of known exploits reduces immediate risk but does not eliminate the need for proactive mitigation.

To mitigate CVE-2025-13382, European organizations should: 1) Immediately review and restrict access to the '/wpfm/v1/file-rename' REST API endpoint, limiting it to trusted roles or IP ranges where feasible. 2) Implement compensating controls such as web application firewalls (WAFs) with custom rules to detect and block unauthorized file rename attempts. 3) Monitor logs for unusual file rename activities, especially those initiated by Subscriber-level users. 4) Enforce strict file ownership validation in custom code or request the vendor to provide a patch that verifies ownership before processing rename requests. 5) Educate administrators and users about the risks of privilege escalation and encourage strong authentication practices to reduce the likelihood of account compromise. 6) Regularly update WordPress plugins and core software to incorporate security patches once available. 7) Consider temporarily disabling the plugin if it is not critical to operations until a secure version is released.