CVE-2014-2023 in Tapatalk Plugin
Summary
by MITRE
Multiple SQL injection vulnerabilities in the Tapatalk plugin 4.9.0 and earlier and 5.x through 5.2.1 for vBulletin allow remote attackers to execute arbitrary SQL commands via a crafted xmlrpc API request to (1) unsubscribe_forum.php or (2) unsubscribe_topic.php in mobiquo/functions/.
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Analysis
by VulDB Data Team • 05/24/2025
The vulnerability identified as CVE-2014-2023 represents a critical SQL injection flaw within the Tapatalk plugin for vBulletin platforms. This vulnerability affects versions 4.9.0 and earlier, as well as 5.x through 5.2.1, creating a significant security risk for organizations utilizing these software versions. The Tapatalk plugin serves as a mobile application interface for vBulletin forums, enabling users to access forum content through XMLRPC API endpoints. The specific attack vectors involve crafted XMLRPC requests targeting two distinct PHP files: unsubscribe_forum.php and unsubscribe_topic.php located within the mobiquo/functions/ directory structure.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the XMLRPC API processing logic. When remote attackers submit maliciously crafted requests to the affected endpoints, the plugin fails to properly escape or validate user-supplied data before incorporating it into SQL query constructions. This allows attackers to inject arbitrary SQL commands that execute within the context of the database connection. The vulnerability manifests through the mobiquo API interface which processes forum subscription management operations, specifically when handling unsubscribe requests for forums and topics. The flaw directly maps to CWE-89 which categorizes SQL injection vulnerabilities as weaknesses that occur when an application incorporates untrusted data into SQL queries without proper sanitization.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to execute arbitrary database commands remotely. Successful exploitation could enable attackers to extract sensitive user information including usernames, passwords, and personal data stored within the vBulletin database. Additionally, attackers might modify or delete forum content, manipulate user permissions, or even escalate privileges within the affected system. The remote nature of this attack means that no local system access or authentication is required to exploit the vulnerability, making it particularly dangerous for publicly accessible forums. Organizations using vulnerable versions of Tapatalk and vBulletin face potential data breaches, service disruption, and compliance violations that could result in significant financial and reputational damage.
Mitigation strategies for CVE-2014-2023 should prioritize immediate patching of affected Tapatalk plugin versions to the latest releases that contain proper input validation and sanitization measures. System administrators should implement network-level protections including firewalls and intrusion detection systems to monitor for suspicious XMLRPC traffic patterns. The implementation of web application firewalls can provide additional layers of protection by filtering malicious requests before they reach the vulnerable application components. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities within the broader application ecosystem. Organizations should also consider implementing database activity monitoring to detect anomalous SQL query patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under the T1190 technique for exploitation of remote services, emphasizing the need for proper access controls and network segmentation to limit the potential impact of such attacks.