CVE-2026-122003 in Abilities Bridge Plugin
Summary
by MITRE • 11/12/2026
The Abilities Bridge WordPress plugin before 1.4.2 does not require a valid nonce before re-authenticating a REST API request from the logged-in session cookie, allowing attackers to make a logged-in administrator perform any REST API action, including creating a new administrator account and taking over the site, by tricking them into opening a crafted page (CSRF).
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Analysis
by VulDB Data Team • 11/12/2026
The Abilities Bridge WordPress plugin version 1.4.2 and earlier contains a critical Cross-Site Request Forgery vulnerability that stems from an insufficient validation of nonces during REST API authentication processes. In secure web application design, particularly within the WordPress ecosystem, Nonce (Number Used Once) tokens are essential for verifying that a request originates from a legitimate user intent rather than being forged by a malicious third party. The flaw in this plugin lies in its failure to enforce strict nonce verification before processing re-authentication requests via REST API endpoints. This oversight allows an attacker to bypass standard security checks, effectively treating any incoming request with a valid session cookie as authentic and authorized for administrative actions.
This vulnerability is classified under CWE-352, which denotes Cross-Site Request Forgery (CSRF). The technical mechanism involves the plugin accepting requests that rely solely on the presence of an active administrator session cookie without validating the accompanying anti-CSRF token. Consequently, if a logged-in administrator with elevated privileges visits a maliciously crafted webpage controlled by an attacker, their browser will automatically include their valid authentication cookies in any HTTP request triggered by that page. The vulnerable plugin interprets this as a legitimate administrative action because it does not detect the absence or invalidity of the required nonce token. This architectural weakness effectively neutralizes the same-origin policy protections intended to prevent unauthorized state-changing requests from external sources.
The operational impact of this vulnerability is severe, potentially leading to complete compromise of the affected WordPress installation. An attacker can exploit this flaw to perform any action that an administrator is authorized to execute via the REST API. This includes creating new user accounts with administrative privileges, modifying site configurations, deleting content, or installing malicious plugins and themes. By tricking a victim into loading a crafted page containing automated requests to these vulnerable endpoints, the attacker achieves remote code execution equivalent in scope to full account takeover. The persistence of this access allows for long-term unauthorized control over the website infrastructure, facilitating data exfiltration, defacement, or further lateral movement within the network environment hosting the WordPress instance.
From a threat intelligence perspective, this attack vector aligns with MITRE ATT&CK techniques related to Account Manipulation and Defense Evasion, specifically leveraging browser-based interactions to bypass authentication controls without requiring direct exploitation of input validation flaws in data fields. The attacker relies on social engineering or drive-by tactics to induce the victim's browser to submit forged requests while authenticated. This method is particularly dangerous because it does not require complex payload injection or buffer overflow exploits; instead, it abuses the trust relationship between the user’s browser and the application server regarding session management protocols.
To mitigate this vulnerability, immediate action must be taken by updating the Abilities Bridge plugin to version 1.4.2 or later, where the developers have implemented proper nonce verification for all REST API endpoints requiring administrative privileges. In environments where patching is not immediately feasible, administrators should implement additional security layers such as Web Application Firewalls that can detect and block anomalous request patterns indicative of CSRF attacks. Furthermore, enforcing strict Content Security Policy headers to restrict cross-origin requests and ensuring that sensitive operations require explicit user interaction rather than automatic submission can significantly reduce the risk surface. Regular auditing of plugin code for proper implementation of WordPress security standards, including nonce validation on all state-changing API calls, is essential to prevent similar vulnerabilities in future updates or other plugins within the ecosystem.