CVE-2024-9364 in SendGrid Plugin
Summary
by MITRE • 10/18/2024
The SendGrid for WordPress plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'wp_mailplus_clear_logs' function in all versions up to, and including, 1.4. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete the plugin's log files.
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Analysis
by VulDB Data Team • 10/18/2024
The vulnerability identified as CVE-2024-9364 affects the SendGrid for WordPress plugin, specifically targeting versions up to and including 1.4. This issue represents a critical authorization flaw that undermines the security posture of WordPress installations relying on this email delivery plugin. The vulnerability stems from a missing capability check within the plugin's codebase, creating an exploitable path for authenticated attackers who possess Subscriber-level access or higher privileges. The affected function 'wp_mailplus_clear_logs' lacks proper permission validation, allowing malicious users to execute unauthorized data deletion operations against the plugin's log files. This represents a significant security oversight that violates fundamental principles of least privilege and access control.
The technical implementation of this vulnerability manifests through the absence of proper capability verification before executing the log clearing functionality. In WordPress security architecture, capability checks serve as the primary mechanism for enforcing user permissions and preventing unauthorized operations. The missing validation means that any authenticated user with Subscriber role or higher can invoke the 'wp_mailplus_clear_logs' function, effectively bypassing the intended access controls. This flaw aligns with CWE-284, which addresses improper access control issues in software systems. The vulnerability creates a direct path for data loss and operational disruption, as log files contain critical information about email delivery attempts, errors, and system behavior that administrators rely upon for monitoring and troubleshooting purposes.
From an operational perspective, this vulnerability enables authenticated attackers to cause unauthorized data loss and system disruption. The deletion of log files can significantly impact forensic analysis capabilities, making it difficult for administrators to diagnose email delivery issues or identify potential security incidents. The compromised system integrity also affects compliance requirements and audit trails that organizations depend on for security monitoring. Attackers could leverage this vulnerability to obscure their activities by removing evidence of failed email delivery attempts or to disrupt normal system operations by eliminating diagnostic information. This vulnerability also fits within ATT&CK framework's T1070.004 technique for indicator removal, where attackers delete logs to avoid detection and maintain persistence within compromised systems.
The mitigation strategy for CVE-2024-9364 requires immediate attention from WordPress administrators and security teams. The primary solution involves updating to the latest version of the SendGrid for WordPress plugin where the missing capability check has been implemented. Organizations should also conduct comprehensive security assessments of their WordPress installations to identify other potentially vulnerable plugins or themes. Network monitoring should be enhanced to detect unusual log file deletion activities, and access controls should be reviewed to ensure that only authorized personnel have Subscriber-level access or higher privileges. Additionally, implementing automated backup solutions for critical log files can provide recovery capabilities in case of unauthorized deletions. The vulnerability demonstrates the importance of proper input validation and capability checks in web applications, reinforcing the need for security testing throughout the software development lifecycle to prevent similar issues from emerging in other components of the WordPress ecosystem.