CVE-2025-12525 in Locker Content Plugin
Summary
by MITRE • 11/25/2025
The Locker Content plugin for WordPress is vulnerable to Sensitive Information Exposure in version 1.0.0 via the 'lockerco_submit_post' AJAX endpoint. This makes it possible for unauthenticated attackers to extract content from posts that has been protected by the plugin.
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Analysis
by VulDB Data Team • 11/25/2025
The Locker Content plugin for WordPress presents a critical security vulnerability classified as CVE-2025-12525, which manifests as sensitive information exposure through its 'lockerco_submit_post' AJAX endpoint. This vulnerability affects version 1.0.0 of the plugin and represents a significant weakness in the platform's access control mechanisms. The flaw allows unauthenticated attackers to exploit the endpoint and extract content from posts that have been protected by the plugin's locking functionality, effectively bypassing the intended security measures designed to restrict access to premium or restricted content.
The technical implementation of this vulnerability stems from inadequate authentication checks within the AJAX endpoint handling mechanism. When the plugin processes requests through the 'lockerco_submit_post' endpoint, it fails to properly validate whether the requesting user possesses the necessary permissions to access the protected content. This authentication gap creates an exploitable condition where any remote attacker can craft malicious requests to retrieve content that should remain restricted. The vulnerability operates at the application layer and specifically targets the plugin's content protection logic, which is designed to prevent unauthorized access to premium posts. According to CWE classification, this represents a weakness in authentication mechanisms where insufficient verification allows unauthorized access to protected resources.
The operational impact of this vulnerability extends beyond simple information disclosure, as it fundamentally undermines the content protection model that WordPress users rely upon when implementing premium content strategies. Attackers can systematically extract protected content from websites using the plugin, potentially affecting publishers who depend on content locking for revenue generation or intellectual property protection. The vulnerability affects all WordPress installations running version 1.0.0 of the Locker Content plugin, regardless of hosting environment or additional security measures. This exposure creates a significant risk for content creators, publishers, and businesses that depend on premium content delivery mechanisms, as the unauthorized extraction of protected material could result in revenue loss and competitive disadvantage.
Security professionals should consider this vulnerability in relation to ATT&CK framework techniques such as T1213 (Data from Information Repositories) and T1071.1 (Application Layer Protocol: Web Protocols) where attackers exploit API endpoints to extract sensitive data. The vulnerability's impact is particularly concerning in environments where the plugin is used for membership sites, subscription-based content delivery, or premium article access. Organizations should immediately implement mitigations including plugin version updates, endpoint access restrictions, and monitoring for unauthorized access attempts. The recommended approach involves either patching to a secure version of the plugin or implementing network-level controls that restrict access to the vulnerable AJAX endpoint until a proper security update is deployed.
This vulnerability highlights the importance of proper input validation and access control implementation in WordPress plugins, particularly those handling sensitive content or user data. The flaw demonstrates how seemingly minor implementation gaps in authentication logic can create substantial security risks. Security teams should conduct comprehensive audits of all installed plugins to identify similar vulnerabilities and establish monitoring protocols for detecting unauthorized access patterns. The exposure of protected content through this endpoint represents a clear violation of data confidentiality principles and requires immediate remediation to prevent potential exploitation at scale.