CVE-2026-3072 in Media Library Assistant Plugin
Summary
by MITRE • 03/05/2026
The Media Library Assistant plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the mla_update_compat_fields_action() function in all versions up to, and including, 3.33. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify taxonomy terms on arbitrary attachments.
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Analysis
by VulDB Data Team • 03/07/2026
The Media Library Assistant plugin for WordPress presents a critical security vulnerability through the absence of proper capability validation within the mla_update_compat_fields_action() function. This flaw affects all plugin versions up to and including 3.33, creating a pathway for authenticated attackers who possess Subscriber-level privileges or higher to manipulate taxonomy terms associated with any media attachment within the WordPress environment. The vulnerability stems from insufficient access controls that should normally prevent users from modifying content they do not have explicit permissions to alter.
This security weakness operates through a fundamental failure in the plugin's permission model where the mla_update_compat_fields_action() function does not properly verify whether the requesting user possesses the necessary capabilities to modify taxonomy terms on attachments. The vulnerability specifically targets the plugin's handling of media library metadata updates, allowing attackers to exploit their authenticated status to perform unauthorized modifications. The impact extends beyond simple data alteration as taxonomy terms often serve as critical organizational elements for media content, making this vulnerability particularly dangerous for content management systems that rely heavily on proper categorization and tagging.
From an operational perspective, this vulnerability creates a significant risk for WordPress installations that utilize the Media Library Assistant plugin, as it allows attackers to manipulate the metadata associated with media files across the entire library. The ability to modify taxonomy terms on arbitrary attachments means that an attacker could potentially reorganize media content in ways that could disrupt content delivery, hide malicious files, or create confusion within the media management system. This type of vulnerability aligns with CWE-284, which addresses improper access control issues, and represents a clear violation of the principle of least privilege that should govern all user interactions with system resources.
The attack vector for this vulnerability requires only an authenticated user account with Subscriber-level permissions or higher, making it particularly concerning as it does not require elevated privileges typically associated with administrative access. This characteristic places the vulnerability in the ATT&CK framework under the category of privilege escalation and persistence techniques, as attackers can use this flaw to modify content in ways that may not be immediately apparent to administrators. The implications extend to data integrity and content management systems where taxonomy terms are used for search functionality, content organization, and automated content delivery systems that rely on proper categorization.
Organizations should immediately implement mitigations including updating to the latest plugin version where this vulnerability has been addressed, conducting thorough security audits of their media library content, and implementing additional monitoring for unauthorized taxonomy modifications. The recommended approach involves verifying that all authenticated users have appropriate capability checks in place before allowing any modifications to taxonomy terms or metadata associated with media attachments. Security teams should also consider implementing automated monitoring systems that can detect unusual patterns of taxonomy term modifications, as these may indicate exploitation of this vulnerability. Additionally, administrators should review user permissions and ensure that only users requiring administrative access to media library metadata have such privileges, thereby reducing the attack surface for this specific vulnerability.