CVE-2025-4179 in Flynax Bridge Plugin
Summary
by MITRE • 05/02/2025
The Flynax Bridge plugin for WordPress is vulnerable to limited Privilege Escalation due to a missing capability check on the registerUser() function in all versions up to, and including, 2.2.0. This makes it possible for unauthenticated attackers to register new user accounts as authors.
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Analysis
by VulDB Data Team • 05/02/2025
The Flynax Bridge plugin for WordPress presents a significant security vulnerability classified as CVE-2025-4179, which allows unauthenticated attackers to exploit a privilege escalation flaw through the registerUser() function. This vulnerability affects all plugin versions up to and including 2.2.0, creating a persistent risk for WordPress installations that utilize this bridge component. The flaw stems from an inadequate capability check implementation that fails to verify user permissions before executing user registration operations, thereby undermining the fundamental security controls that should prevent unauthorized account creation with elevated privileges.
The technical nature of this vulnerability aligns with CWE-284, which addresses improper access control mechanisms within software applications. The missing capability check represents a critical oversight in the plugin's security architecture, as it permits any remote attacker to bypass authentication requirements and create new user accounts. When the registerUser() function executes without proper validation of the requesting user's privileges, it creates an entry point for malicious actors to establish persistent access to the WordPress system. This flaw operates at the application layer and specifically targets the user management functionality, allowing attackers to register accounts with author-level permissions without providing any form of authentication credentials.
The operational impact of this vulnerability extends beyond simple account creation, as it enables attackers to potentially establish footholds within the WordPress environment that could facilitate further exploitation. By registering new accounts as authors, attackers gain access to content management capabilities and can modify or publish content, potentially leading to data corruption, defacement, or the injection of malicious payloads. The unauthenticated nature of this attack vector means that no prior credentials or access are required, making the vulnerability particularly dangerous for systems that do not implement additional network-level security controls. This weakness can be exploited in conjunction with other vulnerabilities to create more comprehensive attack scenarios, potentially leading to complete system compromise.
Organizations using the Flynax Bridge plugin should immediately implement mitigation strategies to address this vulnerability. The primary recommendation involves updating to the latest plugin version where the capability check has been properly implemented. System administrators should also consider implementing additional security measures such as rate limiting on user registration endpoints, network-level firewall rules to restrict access to the plugin's functionality, and monitoring for unusual registration patterns. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and account creation, which are commonly used in initial access and persistence phases of cyber attacks. Regular security audits and vulnerability assessments should be conducted to identify similar capability check failures in other WordPress plugins and themes, as this represents a common pattern of security oversight in content management systems.