CVE-2026-24364: WP User Frontend Auth Bypass Vulnerability

CVE-2026-24364 Overview

A Missing Authorization vulnerability has been identified in the weDevs WP User Frontend plugin for WordPress. This security flaw allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within the WordPress environment. The vulnerability stems from broken access control mechanisms in versions through 4.2.5 of the plugin.

Critical Impact

Authenticated attackers with low privileges can bypass authorization checks and perform unauthorized modifications to WordPress content and settings, potentially compromising site integrity.

Affected Products

• WP User Frontend plugin versions through 4.2.5
• WordPress installations using vulnerable versions of wp-user-frontend
• Sites with user registration or frontend submission functionality enabled

Discovery Timeline

• 2026-03-25 - CVE CVE-2026-24364 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-24364

Vulnerability Analysis

This vulnerability is classified under CWE-862 (Missing Authorization), indicating that the plugin fails to perform proper authorization checks before allowing certain operations. The flaw affects the WP User Frontend plugin, which provides frontend dashboard, profile management, and content submission capabilities for WordPress users.

The vulnerability requires network access and low-level authentication to exploit. An attacker with basic WordPress user privileges can bypass authorization mechanisms to perform actions they should not be permitted to execute. The primary impact is on data integrity, as attackers can modify content or settings without proper authorization.

Root Cause

The root cause of this vulnerability lies in missing authorization checks within the WP User Frontend plugin. Specifically, certain plugin functions and endpoints fail to verify whether the authenticated user has the appropriate permissions to perform requested actions. This is a classic broken access control issue where authentication is present but authorization validation is absent or insufficient.

The plugin likely relies on authentication alone without implementing proper capability checks using WordPress's role and capability system (e.g., current_user_can() function calls).

Attack Vector

The attack requires an authenticated user with at least subscriber-level access to the WordPress site. The attacker can exploit the missing authorization by:

1. Authenticating to the WordPress site with a low-privileged account
2. Identifying plugin endpoints or AJAX handlers that lack authorization checks
3. Sending crafted requests to these endpoints to perform actions beyond their assigned role
4. Modifying content, settings, or other data that should be restricted to higher-privileged users

Since the vulnerability is network-accessible and requires only low privileges with no user interaction, it presents a significant risk to multi-user WordPress installations using this plugin. For detailed technical analysis, refer to the Patchstack security advisory.

Detection Methods for CVE-2026-24364

Indicators of Compromise

• Unauthorized modifications to posts, pages, or user profiles created through WP User Frontend
• Unexpected changes to plugin settings or form configurations
• Audit log entries showing low-privileged users performing administrative actions
• Unusual activity patterns from subscriber or contributor accounts

Detection Strategies

• Monitor WordPress audit logs for authorization-related failures and anomalous user actions
• Implement web application firewall (WAF) rules to detect unusual request patterns to WP User Frontend endpoints
• Review user activity logs for actions that exceed assigned role capabilities
• Deploy endpoint monitoring to track AJAX requests to the wp-user-frontend plugin handlers

Monitoring Recommendations

• Enable comprehensive logging for all WP User Frontend plugin activities
• Configure alerts for bulk modifications or rapid sequential requests from single users
• Implement real-time monitoring for changes to critical WordPress content and settings
• Regularly audit user roles and permissions to ensure principle of least privilege

How to Mitigate CVE-2026-24364

Immediate Actions Required

• Update WP User Frontend plugin to a version newer than 4.2.5 when a patch becomes available
• Review and restrict user registration and role assignment policies
• Audit recent activity logs for signs of exploitation
• Consider temporarily disabling the plugin if immediate patching is not possible

Patch Information

A patched version addressing this vulnerability should be obtained from the official WordPress plugin repository or the weDevs vendor website. Monitor the Patchstack advisory for updates on patch availability. Ensure all WordPress installations using WP User Frontend are updated promptly once a fix is released.

Workarounds

• Restrict user registration to trusted users only until a patch is applied
• Implement additional access control through a WordPress security plugin with capability monitoring
• Use a Web Application Firewall (WAF) to filter suspicious requests to plugin endpoints
• Temporarily disable WP User Frontend features for non-administrative users

# Disable WP User Frontend plugin via WP-CLI until patched
wp plugin deactivate wp-user-frontend

# Verify plugin is deactivated
wp plugin list --status=inactive | grep wp-user-frontend