CVE-2024-7858 in Media Library Folders Plugin
Summary
by MITRE • 08/30/2024
The Media Library Folders plugin for WordPress is vulnerable to unauthorized access due to missing capability checks on several AJAX functions in the media-library-plus.php file in all versions up to, and including, 8.2.3. This makes it possible for authenticated attackers, with subscriber-level access and above, to perform several actions related to managing media files and folder along with controlling settings.
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Analysis
by VulDB Data Team • 08/31/2024
The Media Library Folders plugin for WordPress presents a critical authorization vulnerability that undermines the security posture of affected installations. This vulnerability stems from insufficient capability checks within the plugin's AJAX handling mechanisms, specifically in the media-library-plus.php file. The flaw affects all versions up to and including 8.2.3, creating a persistent risk for WordPress environments that utilize this plugin. The vulnerability is particularly concerning because it allows authenticated attackers who possess subscriber-level privileges or higher to execute unauthorized actions within the media management system. This represents a significant bypass of WordPress's inherent permission model, where users should only be able to perform actions commensurate with their assigned roles and capabilities.
The technical implementation of this vulnerability manifests through multiple AJAX functions that lack proper authentication and authorization verification. When an authenticated user accesses these endpoints, the system fails to validate whether the requesting user possesses the appropriate permissions to execute the targeted operations. This absence of capability checks creates a pathway for privilege escalation within the media library management context. Attackers can leverage this vulnerability to manipulate media files and folder structures, potentially leading to data exposure, content modification, or disruption of media management workflows. The flaw operates at the application layer, exploiting the trust relationship between legitimate users and the plugin's AJAX interface without proper verification of user privileges.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to perform comprehensive media management operations that should be restricted to administrators or users with explicit permissions. Subscribers and other low-privilege users can potentially delete, move, or modify media files and folder configurations, creating opportunities for data integrity compromise and content manipulation. This vulnerability directly impacts the principle of least privilege, where users should only have access to resources and functions necessary for their specific roles. The ability to control plugin settings through these unauthorized pathways further amplifies the potential damage, as attackers might alter core plugin functionality or disable security features. This vulnerability aligns with CWE-284, which addresses improper access control, and represents a clear violation of the principle that access controls should be enforced at the application level.
Mitigation strategies for this vulnerability require immediate attention from system administrators and security teams responsible for WordPress installations. The most effective solution involves updating the Media Library Folders plugin to the latest version where the capability checks have been properly implemented and enforced. Organizations should also conduct thorough security assessments of their WordPress environments to identify any other plugins that might exhibit similar authorization flaws. Network monitoring should be enhanced to detect unusual patterns of media library access or modifications that could indicate exploitation attempts. Security teams should implement role-based access controls that limit the capabilities available to lower-privilege users, while also establishing regular vulnerability scanning procedures to identify similar issues in other installed plugins. This vulnerability demonstrates the critical importance of proper input validation and capability enforcement in web applications, as outlined in the ATT&CK framework's privilege escalation techniques and the broader security community's emphasis on defense in depth strategies.