CVE-2026-42642: GiveWP Authorization Bypass Vulnerability

CVE-2026-42642 Overview

A missing authorization vulnerability has been identified in StellarWP GiveWP, a popular WordPress donation plugin. This broken access control flaw (CWE-862) allows attackers to exploit incorrectly configured access control security levels, potentially leading to unauthorized access to sensitive donation and user information.

Critical Impact

Unauthenticated attackers can exploit missing authorization checks to access restricted functionality or data within GiveWP installations, potentially exposing donor information and plugin configurations.

Affected Products

• StellarWP GiveWP plugin versions through 4.14.5
• WordPress sites running vulnerable GiveWP installations
• Donation management systems using affected GiveWP versions

Discovery Timeline

• 2026-04-29 - CVE-2026-42642 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-42642

Vulnerability Analysis

This vulnerability stems from missing authorization checks within the GiveWP WordPress plugin. The flaw allows unauthenticated users to access functionality that should be restricted to authorized users only. The attack can be executed remotely over the network without requiring any user interaction or prior authentication, making it particularly concerning for public-facing WordPress sites that process donations.

The missing authorization allows potential exposure of confidential information, though the vulnerability does not permit modification of data or disruption of service availability based on the assessed impact characteristics.

Root Cause

The root cause is CWE-862: Missing Authorization. The GiveWP plugin fails to properly verify that users are authorized before allowing access to certain plugin functionality or data endpoints. This occurs when capability checks or permission validations are absent from critical code paths that handle sensitive operations.

Attack Vector

The attack vector is network-based, requiring no privileges and no user interaction. An attacker can send crafted HTTP requests to vulnerable endpoints within the GiveWP plugin to access restricted functionality. The vulnerability exploits incorrectly configured access control security levels, allowing unauthorized data retrieval.

The exploitation methodology involves identifying unprotected AJAX handlers or REST API endpoints within the GiveWP plugin that lack proper current_user_can() checks or nonce verification. Technical details regarding specific vulnerable endpoints can be found in the Patchstack WordPress Vulnerability Advisory.

Detection Methods for CVE-2026-42642

Indicators of Compromise

• Unusual HTTP requests to GiveWP AJAX handlers or REST API endpoints from unauthenticated sources
• Unexpected access patterns to donation-related data or configuration endpoints
• Log entries showing access to restricted GiveWP functionality without proper authentication cookies
• Increased volume of requests to /wp-admin/admin-ajax.php with GiveWP-related action parameters

Detection Strategies

• Monitor WordPress access logs for requests targeting GiveWP plugin endpoints from unauthenticated sessions
• Implement web application firewall rules to detect and block suspicious requests to donation plugin endpoints
• Configure intrusion detection systems to alert on anomalous access patterns to WordPress admin-ajax handlers
• Review audit logs for unauthorized data access attempts related to donor information

Monitoring Recommendations

• Enable detailed access logging for WordPress installations running GiveWP
• Set up alerts for high-volume requests to GiveWP-related endpoints from single IP addresses
• Monitor for data exfiltration patterns that may indicate exploitation of information disclosure vulnerabilities
• Implement real-time monitoring of WordPress plugin API calls for anomalous behavior

How to Mitigate CVE-2026-42642

Immediate Actions Required

• Update GiveWP to a version newer than 4.14.5 that includes the security patch
• Review recent access logs for signs of exploitation attempts targeting GiveWP endpoints
• Implement additional web application firewall rules to restrict access to sensitive plugin functionality
• Audit user access and permissions within the GiveWP plugin configuration

Patch Information

StellarWP should release a patched version addressing this missing authorization vulnerability. Website administrators should update to the latest available version of GiveWP that is newer than 4.14.5. Check the Patchstack WordPress Vulnerability Advisory for the latest patch status and remediation guidance.

Workarounds

• Restrict access to WordPress admin-ajax endpoints using web server configuration or firewall rules
• Implement IP-based access restrictions for sensitive GiveWP functionality until patching is complete
• Consider temporarily disabling affected GiveWP features if the plugin cannot be immediately updated
• Deploy a web application firewall with virtual patching capabilities to block exploitation attempts

# Example: Restrict admin-ajax access using .htaccess (temporary mitigation)
<Files admin-ajax.php>
    <RequireAll>
        Require all granted
        # Add specific IP restrictions or rate limiting as needed
    </RequireAll>
</Files>