CVE-2025-39596 in WP Plugin
Summary
by MITRE • 04/17/2025
Weak Authentication vulnerability in Quentn.com GmbH Quentn WP allows Privilege Escalation. This issue affects Quentn WP: from n/a through 1.2.8.
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Analysis
by VulDB Data Team • 04/17/2025
The vulnerability identified as CVE-2025-39596 represents a critical weakness in the Quentn WP plugin developed by Quentn.com GmbH, specifically targeting authentication mechanisms that enable unauthorized privilege escalation. This weakness manifests within the plugin's authentication framework where insufficient validation controls allow malicious actors to bypass normal access restrictions and elevate their privileges within the affected system. The vulnerability exists across all versions of the Quentn WP plugin from the initial release through version 1.2.8, indicating a long-standing issue that has not been adequately addressed in the plugin's development lifecycle. The affected software operates within WordPress environments where the plugin integrates with core WordPress authentication systems, creating potential attack vectors that could compromise entire WordPress installations.
The technical flaw underlying CVE-2025-39596 stems from inadequate authentication checks that fail to properly validate user credentials or session states during privilege escalation attempts. This weakness creates a pathway where unauthenticated or low-privilege users can manipulate authentication flows to gain administrative access to the WordPress site. The vulnerability likely involves improper handling of authentication tokens, session management flaws, or insufficient input validation that allows attackers to forge authentication requests or exploit weaknesses in the plugin's access control implementation. According to CWE classification systems, this vulnerability aligns with CWE-287 which addresses improper authentication issues, and potentially CWE-305 which covers authentication bypass mechanisms. The flaw demonstrates a fundamental failure in implementing robust authentication controls that should be present in any security-sensitive application component.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete system compromise and potential data breaches. When exploited, the vulnerability allows attackers to perform administrative functions including but not limited to modifying content, installing malicious plugins, accessing sensitive user data, and potentially establishing persistent backdoors within the WordPress environment. The privilege escalation capability means that even if an attacker initially gains access through a low-privilege account or through a public-facing interface, they can escalate to full administrative control of the affected WordPress installation. This creates a significant risk for organizations relying on the Quentn WP plugin, as the vulnerability can be exploited remotely without requiring prior access credentials, making it particularly dangerous in environments where the plugin is widely deployed.
Organizations utilizing the Quentn WP plugin in versions 1.2.8 and earlier should immediately implement mitigations to protect their WordPress installations from exploitation. The primary recommended action involves upgrading to the latest available version of the plugin where the authentication weakness has been addressed through proper implementation of authentication controls. Security administrators should also consider implementing additional network-level protections including firewall rules that restrict access to plugin endpoints, monitoring for suspicious authentication attempts, and conducting thorough vulnerability assessments of the WordPress environment. According to ATT&CK framework, this vulnerability maps to T1078 which covers valid accounts and T1548 which addresses privilege escalation techniques. Organizations should also implement principle of least privilege controls, regularly audit plugin installations, and maintain updated security monitoring tools to detect potential exploitation attempts. The vulnerability underscores the critical importance of maintaining up-to-date security controls and the necessity of thorough security testing for all third-party plugins integrated into WordPress environments.