CVE-2024-0680 in WP Private Content Plus Plugin
Summary
by MITRE • 02/28/2024
The WP Private Content Plus plugin for WordPress is vulnerable to information disclosure in all versions up to, and including, 3.6. This is due to the plugin not properly restricting access to posts via the REST API when a page has been made private. This makes it possible for unauthenticated attackers to view protected posts.
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Analysis
by VulDB Data Team • 02/07/2025
The WP Private Content Plus plugin vulnerability represents a critical access control flaw that undermines the security posture of WordPress installations. This vulnerability affects all versions up to and including 3.6, making it a widespread concern for site administrators who rely on the plugin for content protection. The flaw exists within the plugin's implementation of the WordPress REST API, which is designed to provide programmatic access to site content and functionality. When content is marked as private within the plugin's framework, proper authentication and authorization mechanisms should prevent unauthorized access to that content through the API endpoints.
The technical root cause of this vulnerability stems from inadequate input validation and access control enforcement within the plugin's REST API handlers. Specifically, the plugin fails to properly verify user authentication status when serving requests for private content through the REST API interface. This allows unauthenticated attackers to craft API requests that bypass the normal authorization checks that would typically require valid user credentials or session tokens. The vulnerability operates at the application layer and can be exploited through standard REST API endpoints that the plugin exposes for managing private content access. According to CWE classification, this represents a weakness in the authorization mechanism where the system fails to properly verify that the requesting entity has sufficient privileges to access the requested resource. The flaw essentially creates a backdoor pathway through which sensitive information can be accessed without proper authentication.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially expose sensitive business data, personal information, or proprietary content that administrators intended to keep private. Attackers can leverage this vulnerability to systematically enumerate and access protected posts, potentially gaining insights into business operations, customer data, or confidential communications. The vulnerability affects both authenticated and unauthenticated access scenarios, meaning that even users who are not logged into the WordPress site can exploit this flaw. This makes the attack surface particularly broad and increases the likelihood of successful exploitation. From an attacker's perspective, this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the privilege escalation and defense evasion tactics, as it allows unauthorized access to restricted resources that would normally require proper authentication. The impact is particularly severe for organizations that store sensitive data within private posts and rely on the plugin for content protection.
Mitigation strategies for this vulnerability should focus on immediate remediation through plugin updates to the latest version where the issue has been addressed. Site administrators should also implement additional security controls such as API rate limiting, authentication enforcement, and monitoring of REST API access patterns to detect potential exploitation attempts. Network-level protections including firewall rules and API gateway controls can provide additional layers of defense. Regular security audits of WordPress plugins and themes should be conducted to identify similar access control weaknesses. The vulnerability highlights the importance of proper security testing for third-party plugins, particularly those that interact with core WordPress functionality like the REST API. Organizations should also consider implementing web application firewalls to monitor and block suspicious API requests that attempt to access protected content without proper authorization. Given the nature of the vulnerability, it is recommended that administrators conduct thorough security assessments of their WordPress installations to identify any other potential access control flaws that could be exploited in similar ways.