CVE-2025-4607: WordPress PSW Plugin Privilege Escalation

CVE-2025-4607 Overview

The PSW Front-end Login & Registration plugin for WordPress contains a critical Privilege Escalation vulnerability affecting all versions up to and including 1.12. The flaw exists within the customer_registration() function and stems from the use of a weak, low-entropy One-Time Password (OTP) mechanism in the forget() function. This vulnerability enables unauthenticated attackers to initiate password reset requests for any user account, including administrators, potentially resulting in complete site takeover.

Critical Impact

Unauthenticated attackers can exploit the weak OTP generation to reset administrator passwords and achieve full WordPress site compromise without any prior authentication.

Affected Products

• PSW Front-end Login & Registration plugin for WordPress version 1.12 and earlier
• WordPress installations using the affected plugin versions

Discovery Timeline

• 2025-05-31 - CVE-2025-4607 published to NVD
• 2025-06-02 - Last updated in NVD database

Technical Details for CVE-2025-4607

Vulnerability Analysis

This vulnerability is classified as CWE-330: Use of Insufficiently Random Values. The core issue lies in the plugin's password reset functionality, which generates One-Time Password tokens using a predictable, low-entropy mechanism. When a password reset is initiated through the forget() function, the generated OTP lacks sufficient randomness, making it feasible for attackers to predict or brute-force valid tokens within a reasonable timeframe.

The attack can be performed entirely without authentication, as the password reset functionality is exposed to unauthenticated users by design. Once an attacker successfully guesses or predicts the OTP for an administrator account, they can reset the password and gain full administrative access to the WordPress installation.

Root Cause

The vulnerability originates from the implementation of the OTP generation within the forget() function in class-prositegeneralfeatures-public.php. The plugin uses an insufficiently random method to generate the password reset tokens. Low-entropy OTP values significantly reduce the search space required for an attacker to brute-force valid tokens, especially when combined with no rate limiting on token verification attempts. This design flaw allows attackers to systematically enumerate possible OTP values until a valid one is found.

Attack Vector

The attack is network-based and requires no privileges or user interaction. An attacker can exploit this vulnerability by:

1. Identifying target WordPress sites using the PSW Front-end Login & Registration plugin
2. Initiating a password reset request for a known administrator username or email
3. Exploiting the weak OTP mechanism to predict or brute-force the generated token
4. Using the discovered OTP to complete the password reset process
5. Gaining full administrative access with the newly set password

The vulnerability is particularly dangerous because the attacker can target administrator accounts directly, bypassing the need for any prior authentication or authorization.

Detection Methods for CVE-2025-4607

Indicators of Compromise

• Unusual volume of password reset requests targeting administrator accounts
• Multiple failed OTP verification attempts from single or distributed IP addresses
• Unexpected administrator password changes without legitimate user action
• New administrator accounts created without authorization
• Plugin or theme modifications following unauthorized administrative access

Detection Strategies

• Monitor WordPress authentication logs for anomalous password reset activity targeting administrative users
• Implement Web Application Firewall (WAF) rules to detect brute-force attempts against password reset endpoints
• Review access logs for repeated POST requests to the plugin's password reset functionality
• Enable WordPress security plugin logging to capture authentication events and account modifications
• Set up alerts for any administrative privilege changes or new administrator account creation

Monitoring Recommendations

• Configure real-time alerting on password reset requests for accounts with elevated privileges
• Implement rate limiting on authentication and password reset endpoints to detect enumeration attempts
• Enable comprehensive WordPress audit logging to track all user management activities
• Monitor for unauthorized changes to site configuration, plugins, or user roles following any suspicious activity

How to Mitigate CVE-2025-4607

Immediate Actions Required

• Immediately deactivate and remove the PSW Front-end Login & Registration plugin if running version 1.12 or earlier
• Audit all administrator accounts for unauthorized password changes or suspicious activity
• Force password resets for all administrative users using WordPress native functionality
• Review WordPress user list for any unauthorized accounts with elevated privileges
• Check for unauthorized plugin installations, theme modifications, or file changes

Patch Information

As of the publication date, administrators should check the WordPress Plugin Developer Information for security updates. The Wordfence Vulnerability Report provides additional details on the vulnerability status and any available patches. Until a patched version is confirmed, the safest approach is to disable the plugin entirely.

Workarounds

• Disable the PSW Front-end Login & Registration plugin until a security update is available from the vendor
• Implement strong rate limiting on password reset endpoints using a Web Application Firewall or security plugin
• Use alternative login and registration plugins that implement cryptographically secure OTP generation
• Restrict administrative access to trusted IP addresses only using WordPress security configurations
• Enable two-factor authentication for all administrator accounts as an additional security layer

# WordPress CLI commands to disable the vulnerable plugin
wp plugin deactivate psw-login-and-registration --path=/var/www/html

# Force password reset for all administrators
wp user reset-password $(wp user list --role=administrator --field=ID --path=/var/www/html) --path=/var/www/html

# List all administrator accounts for audit
wp user list --role=administrator --path=/var/www/html