CVE-2024-12616 in Bitlys Plugin
Summary
by MITRE • 01/09/2025
The Bitly's WordPress Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on several AJAX actions in all versions up to, and including, 2.7.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update and retrieve plugin settings.
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Analysis
by VulDB Data Team • 01/09/2025
The vulnerability identified as CVE-2024-12616 affects the Bitly's WordPress Plugin, a widely used tool for URL shortening and analytics within WordPress environments. This security flaw represents a critical authorization bypass issue that undermines the plugin's ability to properly enforce access controls for administrative functions. The vulnerability specifically targets the plugin's AJAX handling mechanisms, which are commonly used to provide dynamic user interface interactions without full page reloads. The affected plugin versions up to and including 2.7.3 fail to implement proper capability checks before processing sensitive operations, creating a pathway for unauthorized data manipulation.
The technical implementation of this vulnerability stems from the absence of capability verification within multiple AJAX endpoints exposed by the plugin. When authenticated users with Subscriber-level privileges or higher attempt to interact with the plugin's administrative functions through AJAX requests, the system fails to validate whether the requesting user possesses the appropriate permissions to perform the requested actions. This missing authorization check creates a direct vector for privilege escalation and data modification. According to CWE-284, this vulnerability maps directly to inadequate access control mechanisms where insufficient checks allow unauthorized operations. The flaw exists in the plugin's core architecture where AJAX handlers do not properly validate user capabilities before executing sensitive operations, making it a classic example of improper privilege management.
The operational impact of this vulnerability extends beyond simple data modification to encompass potential security breaches within WordPress installations. Attackers with Subscriber-level access can exploit this flaw to alter plugin configurations, potentially redirecting traffic or modifying analytics data. This capability allows for malicious actors to manipulate the plugin's behavior without detection, creating opportunities for phishing campaigns, data exfiltration, or disruption of legitimate services. The vulnerability affects the integrity of the WordPress environment by enabling unauthorized modifications to plugin settings that may influence how URLs are processed and tracked. From an ATT&CK perspective, this vulnerability aligns with technique T1078 which covers valid accounts and privilege escalation, as attackers can leverage existing user accounts to perform unauthorized administrative actions.
Mitigation strategies for CVE-2024-12616 require immediate action from WordPress administrators and security teams. The most effective immediate solution involves updating to the latest version of the Bitly WordPress Plugin where the capability checks have been properly implemented. Organizations should also implement network monitoring to detect unusual AJAX activity patterns that might indicate exploitation attempts. Security teams should review user permissions and consider implementing additional access controls through WordPress security plugins or custom code solutions. The vulnerability demonstrates the critical importance of proper input validation and capability checks in web applications, particularly in administrative interfaces. Regular security audits of WordPress plugins should include verification of access control mechanisms, ensuring that all AJAX endpoints properly validate user privileges before executing sensitive operations. This vulnerability serves as a reminder that even minor access control oversights can create significant security risks in content management systems.