CVE-2025-5957 in Guest Support Plugin
Summary
by MITRE • 07/08/2025
The Guest Support – Complete customer support ticket system for WordPress plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'deleteMassTickets' function in all versions up to, and including, 1.2.2. This makes it possible for unauthenticated attackers to delete arbitrary support tickets.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 05/16/2026
The vulnerability in the Guest Support WordPress plugin represents a critical authorization flaw that undermines the integrity of customer support ticket management systems. This issue affects all versions up to and including 1.2.2, where the plugin fails to properly validate user permissions before executing destructive operations. The vulnerability specifically resides within the 'deleteMassTickets' function which lacks adequate capability checks, allowing any user regardless of authentication status to perform ticket deletion operations. This represents a fundamental breakdown in the plugin's access control mechanisms and exposes organizations to potential data loss and operational disruption.
The technical implementation of this vulnerability stems from the absence of proper authentication and authorization validation within the plugin's core functions. When attackers access the 'deleteMassTickets' endpoint, the system does not verify whether the requesting user possesses the necessary administrative privileges or even basic authentication credentials. This missing capability check creates an arbitrary code execution path where unauthorized actors can manipulate the plugin's ticket management system to remove support tickets. The vulnerability operates at the application layer and can be exploited through direct API calls or by crafting malicious requests that target the specific function endpoint, making it particularly dangerous as it requires no prior access credentials or elevated privileges.
The operational impact of this vulnerability extends beyond simple data loss, creating potential security risks for organizations relying on the plugin for customer support management. Unauthenticated attackers can systematically delete support tickets, potentially disrupting customer service operations and compromising the ability to track support requests. This vulnerability can be exploited to remove evidence of customer interactions, making it difficult for organizations to maintain audit trails and support historical records. The scope of damage increases with the volume of tickets that can be deleted in mass operations, potentially affecting entire support histories and undermining the reliability of the support system. Organizations may face compliance issues if sensitive customer data contained in deleted tickets cannot be recovered, particularly in regulated environments where data retention requirements apply.
Mitigation strategies for this vulnerability require immediate implementation of proper capability checks and authentication validation within the plugin's functions. Administrators should upgrade to the latest version of the plugin where the authorization flaw has been addressed through proper access control mechanisms. The fix should implement role-based access controls that ensure only authenticated administrators can execute ticket deletion operations, with additional logging of all deletion activities for audit purposes. Organizations should also implement network-level restrictions to limit access to plugin endpoints and monitor for suspicious deletion patterns. Security measures should include input validation and rate limiting to prevent automated exploitation attempts, while regular security audits should verify that all plugin functions properly enforce authorization requirements. This vulnerability aligns with CWE-285 which addresses improper authorization in software systems, and represents a technique commonly seen in ATT&CK framework under privilege escalation and data destruction categories, emphasizing the need for comprehensive access control implementation across all application functions.