CVE-2026-14291 in Security Ninja Premium Plugin
Summary
by MITRE • 07/23/2026
The security-ninja-premium WordPress plugin before 5.290 does not verify the second authentication factor in one of its two-factor authentication code paths, allowing an unauthenticated attacker who knows a user's password to complete authentication without the one-time code and bypass enforced two-factor authentication for any account, including administrators. The affected two-factor module ships only in the premium build.
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Analysis
by VulDB Data Team • 07/23/2026
The vulnerability in the security-ninja-premium WordPress plugin affects versions prior to 5.290 and represents a critical authentication bypass flaw that undermines the security posture of WordPress installations relying on this plugin. This issue specifically targets the two-factor authentication implementation within the premium version, creating a scenario where an attacker can completely circumvent the intended multi-factor security controls. The flaw exists in a dedicated two-factor authentication code path that lacks proper verification of the second authentication factor, effectively allowing unauthorized access when combined with knowledge of a valid user password.
The technical nature of this vulnerability stems from improper validation logic within the authentication flow where the system accepts user credentials without requiring the mandatory second factor. This represents a clear violation of security principle 10 in the OWASP Authentication Cheat Sheet which emphasizes that multi-factor authentication must be enforced at all times and cannot be bypassed through credential guessing or other attack vectors. The flaw operates as a bypass mechanism in the authentication process where the system validates the first factor (password) but fails to enforce the second factor (one-time code) in one specific code path. This creates an authentication loophole that allows attackers to proceed with full access privileges without completing the required two-factor verification step.
The operational impact of this vulnerability is severe and far-reaching within WordPress environments, particularly those utilizing the premium security-ninja plugin. An attacker who has obtained a valid user password can exploit this weakness to gain complete administrative control over accounts without needing to intercept or guess the second factor authentication codes. This scenario allows for privilege escalation attacks that could result in full system compromise, data exfiltration, and unauthorized modifications to website content. The vulnerability affects all user accounts including administrators, making it particularly dangerous for high-privilege targets within the WordPress ecosystem.
The security implications extend beyond immediate access control breaches as this vulnerability enables attackers to maintain persistent access to compromised systems while bypassing security controls designed to prevent such scenarios. According to CWE-305, "Authentication Bypass Through User Identification in a Security Module," this flaw represents a direct violation of proper authentication mechanisms where the system fails to enforce required security checks. The ATT&CK framework categorizes this vulnerability under T1078 Valid Accounts as it allows adversaries to leverage legitimate user credentials to bypass security controls. Organizations should treat this as a critical vulnerability requiring immediate remediation, particularly in environments where administrative access is required.
Mitigation strategies should include immediate upgrade to version 5.290 or later of the security-ninja-premium plugin to address the authentication bypass flaw. Network administrators should also implement additional monitoring for unusual login patterns and ensure that all user accounts have properly configured two-factor authentication mechanisms. Security teams should conduct comprehensive audits of all WordPress installations to identify other potential vulnerabilities in authentication flows and ensure that all security controls are functioning as intended. The incident highlights the importance of proper code review processes and security testing, particularly for authentication modules where bypass scenarios could lead to complete system compromise. Organizations should also consider implementing additional layers of security such as IP whitelisting, account lockout mechanisms, and regular security assessments to prevent exploitation of similar vulnerabilities in other systems.