CVE-2025-58969 in Custom Login URL Plugin
Summary
by MITRE • 09/22/2025
Missing Authorization vulnerability in Greg Winiarski Custom Login URL allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Custom Login URL: from n/a through 1.0.2.
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Analysis
by VulDB Data Team • 09/22/2025
The CVE-2025-58969 vulnerability represents a critical authorization flaw within the Greg Winiarski Custom Login URL plugin, specifically impacting versions ranging from n/a through 1.0.2. This security weakness stems from improper access control configuration that allows unauthorized users to bypass intended authentication mechanisms. The vulnerability manifests as a missing authorization check that should normally validate user permissions before granting access to protected resources or administrative functions. Such a flaw directly contravenes fundamental security principles outlined in the OWASP Top Ten, particularly the failure to properly protect sensitive data and the lack of proper access control measures.
The technical implementation of this vulnerability occurs at the application level where the plugin fails to enforce proper authorization checks during login and access operations. Attackers can exploit this weakness by directly accessing protected endpoints or functionality that should only be available to authenticated administrators or authorized users. This misconfiguration creates a path for privilege escalation attacks where unauthenticated users can potentially gain access to administrative panels, user data, or system configuration settings. The vulnerability aligns with CWE-285, which describes improper authorization scenarios, and represents a clear violation of the principle of least privilege that should govern all access control implementations.
The operational impact of CVE-2025-58969 extends beyond simple unauthorized access to encompass potential data breaches, system compromise, and complete loss of administrative control over affected systems. Organizations running vulnerable versions of the Custom Login URL plugin face significant risk of unauthorized modifications to login configurations, potential credential theft, and exposure of sensitive user information. The attack surface expands when considering that this vulnerability could be leveraged as a stepping stone for more sophisticated attacks, potentially leading to full system compromise. This aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through unauthorized access to systems.
Mitigation strategies for CVE-2025-58969 require immediate action including updating to the latest version of the Custom Login URL plugin where the authorization flaw has been patched. System administrators should also implement additional monitoring and access control measures to detect unauthorized access attempts. Network segmentation and the principle of least privilege should be enforced to limit the potential damage from any successful exploitation. Security teams should conduct thorough vulnerability assessments of all installed plugins and themes to identify similar authorization flaws. The remediation process should include reviewing all access control configurations and implementing proper logging and alerting mechanisms to detect anomalous access patterns that might indicate exploitation attempts. Organizations should also consider implementing web application firewalls and additional security controls to protect against this class of vulnerability in their broader infrastructure.