CVE-2025-52817: Abandoned Contact Form 7 Auth Bypass Flaw

CVE-2025-52817 Overview

CVE-2025-52817 is a Missing Authorization vulnerability (CWE-862) affecting the ZealousWeb Abandoned Contact Form 7 WordPress plugin. This vulnerability allows attackers to exploit incorrectly configured access control security levels, potentially gaining unauthorized access to plugin functionality and sensitive form submission data.

The vulnerability stems from broken access control mechanisms within the plugin, enabling unauthenticated or low-privileged users to perform actions that should require administrative privileges.

Critical Impact

Unauthorized users may access, modify, or delete abandoned form submissions containing potentially sensitive user data collected through Contact Form 7 forms.

Affected Products

• ZealousWeb Abandoned Contact Form 7 plugin versions up to and including 2.2
• WordPress sites using vulnerable versions of the abandoned-contact-form-7 plugin

Discovery Timeline

• 2025-06-27 - CVE CVE-2025-52817 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-52817

Vulnerability Analysis

This Missing Authorization vulnerability occurs when the Abandoned Contact Form 7 plugin fails to properly verify user permissions before allowing access to protected functionality. The plugin is designed to capture and store form submissions that users abandon before completing, making the data it collects potentially sensitive.

The broken access control allows attackers to bypass authorization checks, potentially accessing administrative features without proper authentication. This type of vulnerability typically manifests when AJAX handlers or admin functions lack proper capability checks using WordPress functions like current_user_can().

Root Cause

The root cause is improper implementation of access control mechanisms within the plugin. Specifically, the plugin fails to adequately verify that users have the necessary permissions before processing requests that should be restricted to administrators. This is classified under CWE-862 (Missing Authorization), indicating that the application does not perform authorization checks for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack Vector

An attacker can exploit this vulnerability by directly accessing plugin endpoints or AJAX actions without proper authorization. Since the plugin handles abandoned form data, a successful attack could expose:

• Contact information submitted through forms (names, emails, phone numbers)
• Partial form submissions containing sensitive data
• Internal plugin configuration settings

The attack can be performed remotely without authentication, as the access control checks are missing or improperly implemented. Attackers could enumerate or extract stored form submission data by crafting requests to unprotected plugin endpoints.

Detection Methods for CVE-2025-52817

Indicators of Compromise

• Unusual access patterns to WordPress AJAX endpoints related to abandoned-contact-form-7
• Unexpected database queries targeting plugin-specific tables storing abandoned form data
• Access logs showing requests to plugin admin pages from unauthenticated sessions
• Suspicious export or bulk retrieval of form submission data

Detection Strategies

• Monitor WordPress AJAX handler calls for abandoned-contact-form-7 related actions from unauthenticated users
• Review server access logs for direct requests to plugin files bypassing normal WordPress routing
• Implement Web Application Firewall (WAF) rules to detect unauthorized access attempts to plugin endpoints
• Enable WordPress debug logging to track capability check failures

Monitoring Recommendations

• Configure security plugins to alert on unauthorized admin-ajax.php requests
• Set up file integrity monitoring for the abandoned-contact-form-7 plugin directory
• Monitor database access patterns for abnormal queries against plugin tables
• Review user activity logs for unauthorized access to form submission data

How to Mitigate CVE-2025-52817

Immediate Actions Required

• Update the Abandoned Contact Form 7 plugin to a patched version when available from ZealousWeb
• Temporarily disable the plugin if a patch is not available and the functionality is not critical
• Review access logs for any signs of exploitation
• Audit stored form submission data for potential data breach implications

Patch Information

Refer to the Patchstack Vulnerability Report for the latest patch information and remediation guidance. Monitor the WordPress plugin repository for updated versions of the abandoned-contact-form-7 plugin that address this vulnerability.

Workarounds

• Restrict access to WordPress admin-ajax.php at the web server level for untrusted users
• Implement additional access control using a security plugin with capability enforcement
• Use a Web Application Firewall to block unauthorized requests to plugin endpoints
• Consider temporarily deactivating the plugin until a patched version is available

# Configuration example - Restrict AJAX access via .htaccess (Apache)
# Add to WordPress root .htaccess file
<Files admin-ajax.php>
    <RequireAll>
        Require all granted
        # Add IP restrictions if needed
        # Require ip 192.168.1.0/24
    </RequireAll>
</Files>