The vulnerability identified as CVE-2025-12525 affects the Locker Content plugin developed by appglut for WordPress, specifically version 1.0.0 and potentially all versions as indicated by the affectedVersions field. The flaw resides in the 'lockerco_submit_post' AJAX endpoint, which is designed to handle content submissions or retrievals related to posts protected by the plugin. Due to improper access controls, unauthenticated attackers can exploit this endpoint to retrieve sensitive content that the plugin is supposed to protect. This constitutes a CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerability. The CVSS v3.1 base score is 5.3, reflecting a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and impact limited to confidentiality (C:L) without affecting integrity (I:N) or availability (A:N). The vulnerability does not require authentication or user interaction, making exploitation straightforward if the plugin is installed and active. No patches or fixes are currently linked, and no known exploits have been reported in the wild as of the publication date (November 25, 2025).

For European organizations, this vulnerability poses a risk of unauthorized disclosure of sensitive or protected content managed through the Locker Content plugin on WordPress sites. This could lead to leakage of confidential business information, intellectual property, or personal data, potentially violating data protection regulations such as the GDPR. Although the vulnerability does not allow modification or deletion of content, the exposure of sensitive information alone can result in reputational damage, loss of customer trust, and possible regulatory penalties. Organizations relying on this plugin for content protection should be aware that attackers can remotely and anonymously access protected content, increasing the risk profile. The impact is particularly significant for sectors handling sensitive data such as finance, healthcare, legal services, and media within Europe.

Since no official patch is currently available, European organizations should implement immediate compensating controls. These include restricting access to the 'lockerco_submit_post' AJAX endpoint via web application firewalls (WAFs) or server-level access controls to allow only trusted IP addresses or authenticated users. Administrators should audit their WordPress installations to identify the presence of the Locker Content plugin and disable or remove it if not essential. Monitoring web server logs for unusual or repeated access attempts to the vulnerable endpoint can help detect exploitation attempts. Additionally, organizations should follow the vendor's communications closely for any forthcoming patches and apply them promptly. Employing content encryption or alternative content protection mechanisms may also reduce reliance on vulnerable plugins. Regular security assessments and plugin inventory management are recommended to prevent similar exposures.