CVE-2026-110955 in Wurdey Plugin
Summary
by MITRE • 11/06/2026
The Wurdey WordPress plugin through 1.0.0 does not verify a request signature before logging a user in, allowing unauthenticated attackers to authenticate as an administrator knowing only the administrator's username.
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Analysis
by VulDB Data Team • 11/06/2026
The vulnerability identified within the Wurdey WordPress plugin prior to version 1.0.0 represents a critical authentication bypass flaw rooted in insufficient verification of cryptographic signatures during the login process. This security defect allows unauthenticated attackers to assume administrative privileges on compromised websites without possessing valid credentials, specifically requiring only knowledge of an administrator's username. The core technical failure lies in the application logic where the system accepts and processes login requests that lack a proper digital signature or fail to validate its integrity against expected cryptographic standards. In secure authentication flows, particularly those involving sensitive actions like administrative access, systems must verify that incoming requests originate from legitimate sources by validating signatures generated through shared secrets or public key infrastructure. By omitting this verification step, the plugin effectively disables a primary layer of defense designed to prevent replay attacks and unauthorized impersonation, thereby reducing the complexity required for an attacker to gain control over the application environment.
From a technical perspective, this flaw aligns with CWE-287, which describes Improper Authentication, specifically falling under scenarios where authentication mechanisms are bypassed due to missing or weak verification steps. The absence of signature validation means that any entity capable of sending HTTP requests to the affected endpoint can attempt to authenticate as an administrator. This is particularly dangerous in WordPress ecosystems because administrative accounts possess full control over site content, user management, plugin installation, and server-level configurations via included tools like the theme editor or file manager. An attacker exploiting this vulnerability does not need to crack passwords or exploit SQL injection flaws; they merely need to identify a valid username associated with an administrator role. This significantly lowers the barrier for entry, enabling automated scanning tools to rapidly compromise multiple sites that have outdated versions of the plugin installed.
The operational impact of this vulnerability is severe and multifaceted. Once authenticated as an administrator, an attacker can execute arbitrary code by uploading malicious plugins or themes, deface the website's public-facing content, steal sensitive data stored in the WordPress database such as user credentials and personal information, or install backdoors to maintain persistent access even if the initial vulnerability is patched. Furthermore, compromised WordPress sites are frequently leveraged for distributed denial-of-service attacks, spam distribution, and hosting phishing pages targeting other users. The lack of signature verification also implies that session management may be similarly flawed, potentially allowing attackers to hijack existing sessions or create new ones with elevated privileges without triggering standard security alerts or logging mechanisms effectively designed to detect anomalous login behavior.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary and most effective solution is to upgrade the Wurdey plugin to version 1.0.1 or later, where this signature verification logic has been implemented correctly. Administrators should also enforce strong password policies for all user accounts, particularly those with administrative privileges, to add a secondary layer of defense in case similar vulnerabilities exist elsewhere in the application stack. Implementing Web Application Firewalls can help detect and block suspicious login attempts that exhibit patterns consistent with automated exploitation tools. Additionally, restricting access to the WordPress admin area by IP address using server-level configurations or security plugins reduces the attack surface significantly. Regular auditing of installed plugins for known vulnerabilities is essential, as well as ensuring that all components adhere to secure coding standards such as those outlined in OWASP guidelines for authentication and session management.
This incident highlights the importance of rigorous input validation and cryptographic verification in web application development. The failure to verify request signatures indicates a deviation from established security best practices where trust should never be assumed based solely on user-provided identifiers like usernames. Security architects must ensure that every sensitive operation, especially those altering state or granting elevated privileges, is protected by robust authentication mechanisms that rely on verified proofs of identity rather than simple knowledge-based factors alone. By addressing this flaw and reinforcing the overall security posture, organizations can prevent unauthorized administrative access and protect their digital assets from exploitation through such straightforward yet devastating vulnerabilities.