CVE-2026-12689 in ProfileGrid Plugin
Summary
by MITRE • 07/24/2026
The ProfileGrid WordPress plugin before 5.9.9.7 does not perform any authorization or ownership check on some of its private-message thread actions, allowing authenticated users with Subscriber-level access and above to soft-delete, tamper with the metadata of, and mark as read other users' private message threads.
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Analysis
by VulDB Data Team • 07/24/2026
The ProfileGrid WordPress plugin vulnerability represents a critical authorization flaw that undermines the security model of private messaging functionality within the platform. This issue affects versions prior to 5.9.9.7 and specifically targets the plugin's handling of private message thread operations. The vulnerability stems from inadequate access control mechanisms that fail to verify whether authenticated users possess legitimate ownership rights over the target message threads they attempt to manipulate. Authentication levels ranging from subscriber status upward can exploit this weakness, creating a significant risk for user privacy and data integrity.
The technical nature of this flaw lies in the absence of proper ownership validation checks during private message thread operations. When users with subscriber-level privileges or higher attempt to perform actions such as soft-deleting threads, modifying metadata, or marking messages as read, the plugin does not verify whether these users are the actual recipients or senders of the targeted communications. This oversight creates a privilege escalation path that allows unauthorized access to other users' private conversations and personal data. The vulnerability operates at the application layer and directly impacts the confidentiality and integrity of user communications within the WordPress ecosystem.
The operational impact of this vulnerability extends beyond simple data exposure, creating potential risks for user privacy and platform security. Attackers with subscriber-level accounts can manipulate private messaging threads that belong to other users, potentially disrupting communication patterns, deleting sensitive information, or altering metadata that might contain important contextual details about messages. This capability could enable social engineering attacks, data manipulation, or the creation of false communication trails that undermine trust in the messaging system. The vulnerability particularly affects platforms where ProfileGrid is used for member communications, user forums, or collaborative environments where private messaging is a core feature.
Security professionals should note this issue aligns with CWE-285 (Improper Authorization) and represents a significant gap in the principle of least privilege enforcement within WordPress plugins. The vulnerability also maps to ATT&CK technique T1078.004 (Valid Accounts: Cloud Accounts) as it exploits legitimate user accounts to access unauthorized resources. Mitigation strategies should include immediate plugin updates to version 5.9.9.7 or later, implementation of additional access control layers, and monitoring for unauthorized private messaging thread modifications. Organizations using ProfileGrid should conduct thorough security assessments of their messaging systems and consider implementing audit trails for private message operations to detect potential exploitation attempts.