CVE-2025-53444: Userpro Plugin CSRF Vulnerability

CVE-2025-53444 Overview

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the DeluxeThemes UserPro plugin for WordPress. This security flaw allows attackers to trick authenticated users into performing unintended actions on the vulnerable WordPress site by crafting malicious requests that exploit the lack of proper CSRF token validation.

Critical Impact

Attackers can leverage this CSRF vulnerability to perform unauthorized actions on behalf of authenticated users, potentially leading to unauthorized modifications to user profiles, settings changes, or other state-changing operations within the UserPro plugin.

Affected Products

• DeluxeThemes UserPro plugin versions prior to 5.1.11
• WordPress installations running vulnerable UserPro versions

Discovery Timeline

• April 15, 2026 - CVE-2025-53444 published to NVD
• April 15, 2026 - Last updated in NVD database

Technical Details for CVE-2025-53444

Vulnerability Analysis

This Cross-Site Request Forgery vulnerability exists due to missing or improper nonce verification in the UserPro plugin. WordPress uses nonces (number used once) as security tokens to protect against CSRF attacks, but the affected versions of UserPro fail to properly implement this protection mechanism for certain actions.

When a user is authenticated to a WordPress site with the vulnerable UserPro plugin installed, an attacker can craft a malicious webpage or email containing a forged request. If the victim visits this malicious content while logged in, their browser will automatically include session cookies with the forged request, causing the WordPress site to process the action as if it were legitimately initiated by the user.

The vulnerability affects the integrity of user data and plugin functionality, though it does not directly impact confidentiality or availability. Successful exploitation requires user interaction—specifically, the victim must be tricked into clicking a malicious link or visiting an attacker-controlled page while authenticated to the target site.

Root Cause

The root cause of this vulnerability is the absence of proper Cross-Site Request Forgery protection mechanisms in the UserPro plugin. Specifically, the plugin fails to implement WordPress nonce verification functions such as wp_verify_nonce() or check_admin_referer() for state-changing operations. This allows external sites to forge requests that the WordPress installation accepts as legitimate user actions.

Attack Vector

The attack requires network access and user interaction. An attacker must convince an authenticated user to visit a malicious webpage or click a crafted link. The attacker does not need any prior authentication or privileges on the target WordPress installation to exploit this vulnerability.

The attack flow typically involves:

1. Attacker identifies a vulnerable UserPro action endpoint that lacks CSRF protection
2. Attacker crafts a malicious HTML page containing a hidden form or script that submits a forged request
3. Attacker lures an authenticated WordPress administrator or user to visit the malicious page
4. The victim's browser automatically sends the forged request with valid session cookies
5. The WordPress site processes the unauthorized action

Since no verified code examples are available, the vulnerability mechanism involves forged HTTP requests (typically POST) to UserPro plugin endpoints. The malicious requests appear legitimate because they include the victim's valid session cookies. For detailed technical information, refer to the Patchstack security advisory.

Detection Methods for CVE-2025-53444

Indicators of Compromise

• Unexpected changes to user profiles or UserPro settings without administrator action
• Web server logs showing POST requests to UserPro endpoints originating from suspicious external referrers
• User reports of account modifications they did not initiate
• Unusual patterns of administrative actions occurring in rapid succession

Detection Strategies

• Monitor web server access logs for requests to UserPro plugin endpoints with external or missing Referer headers
• Implement Content Security Policy (CSP) headers and monitor for violations that may indicate CSRF attempts
• Review WordPress audit logs for unexpected user profile changes or plugin setting modifications
• Deploy Web Application Firewall (WAF) rules to detect and block requests with suspicious referrer patterns

Monitoring Recommendations

• Enable comprehensive WordPress activity logging using security plugins
• Configure alerts for administrative actions performed on UserPro-related functionality
• Regularly audit user account changes and plugin configuration modifications
• Monitor for unusual traffic patterns to WordPress plugin endpoints

How to Mitigate CVE-2025-53444

Immediate Actions Required

• Update the UserPro plugin to version 5.1.11 or later immediately
• Review WordPress audit logs for any signs of unauthorized modifications during the exposure window
• Verify that no unauthorized changes have been made to user profiles or plugin settings
• Consider temporarily disabling the UserPro plugin if immediate patching is not possible

Patch Information

DeluxeThemes has addressed this vulnerability in UserPro version 5.1.11. The patch implements proper nonce verification for vulnerable endpoints, ensuring that state-changing requests include valid CSRF tokens. Administrators should update through the WordPress plugin management interface or by manually downloading the patched version from the official source.

For additional details, consult the Patchstack vulnerability database entry.

Workarounds

• Implement a Web Application Firewall (WAF) with CSRF protection rules as a temporary mitigation layer
• Restrict access to WordPress admin areas to trusted IP addresses where feasible
• Educate administrators to avoid clicking untrusted links while logged into WordPress
• Consider using browser extensions that block cross-origin requests as an additional defense layer

# WordPress CLI command to update the UserPro plugin
wp plugin update userpro

# Verify the installed version after update
wp plugin get userpro --field=version