CVE-2025-12825: WordPress CF7 Plugin Data Disclosure Flaw

CVE-2025-12825 Overview

The User Registration Using Contact Form 7 plugin for WordPress contains a broken access control vulnerability due to a missing capability check on the get_cf7_form_data function. This flaw affects all versions up to and including 2.5, allowing unauthenticated attackers to retrieve sensitive form settings, including Facebook app secrets.

Critical Impact

Unauthenticated attackers can access sensitive configuration data including Facebook app secrets, potentially leading to account takeover or further exploitation of connected services.

Affected Products

• User Registration Using Contact Form 7 plugin for WordPress versions up to and including 2.5
• WordPress installations using the vulnerable plugin versions
• Sites with Facebook integration configured through the plugin

Discovery Timeline

• 2026-01-17 - CVE CVE-2025-12825 published to NVD
• 2026-01-17 - Last updated in NVD database

Technical Details for CVE-2025-12825

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), which occurs when the software does not perform an authorization check when an actor attempts to access a resource or perform an action. In this case, the get_cf7_form_data function lacks proper capability verification before returning form configuration data.

The vulnerability allows unauthenticated users to access the function endpoint and retrieve form settings that should only be accessible to administrators. The exposure of Facebook app secrets is particularly concerning as it could enable attackers to impersonate the application, access user data, or perform actions on behalf of the application.

Root Cause

The root cause of this vulnerability is the absence of a capability check in the get_cf7_form_data function. WordPress plugins should implement proper authorization checks using functions like current_user_can() to verify that the requesting user has appropriate permissions before returning sensitive data. Without this check, any visitor to the site can invoke this function and retrieve protected configuration data.

Attack Vector

The attack is network-based and requires no authentication, privileges, or user interaction. An attacker can directly call the vulnerable function endpoint from an external network location. The attack complexity is low, making exploitation straightforward for anyone aware of the vulnerability.

The exploitation flow involves:

1. Identifying a WordPress site running the vulnerable plugin version
2. Sending a crafted request to the get_cf7_form_data function endpoint
3. Receiving form settings data including Facebook app secrets in the response
4. Using the exposed credentials for further attacks against connected services

Detection Methods for CVE-2025-12825

Indicators of Compromise

• Unusual HTTP requests targeting Contact Form 7 plugin endpoints from unauthenticated sources
• Access log entries showing requests to get_cf7_form_data function endpoints
• Unexpected API calls or authentication attempts using your Facebook app credentials
• Anomalous traffic patterns to WordPress AJAX handlers

Detection Strategies

• Monitor WordPress access logs for requests to plugin AJAX endpoints without authenticated sessions
• Implement Web Application Firewall (WAF) rules to detect and block requests targeting known vulnerable endpoints
• Review Facebook app activity logs for unauthorized access attempts or suspicious API usage
• Deploy SentinelOne Singularity to detect anomalous application behavior and unauthorized data access patterns

Monitoring Recommendations

• Enable detailed logging for WordPress AJAX requests and plugin activity
• Set up alerts for failed or unusual Facebook API authentication attempts
• Regularly audit plugin versions and compare against known vulnerability databases
• Monitor network traffic for data exfiltration patterns following potential exploitation

How to Mitigate CVE-2025-12825

Immediate Actions Required

• Update the User Registration Using Contact Form 7 plugin to a patched version immediately
• Rotate any Facebook app secrets that may have been exposed through the vulnerable configuration
• Review access logs for evidence of exploitation attempts
• Consider temporarily disabling the plugin if an update is not immediately available

Patch Information

A security patch has been released to address this vulnerability. The fix can be reviewed in the WordPress Plugin Changeset. Additional technical details are available in the Wordfence Vulnerability Report.

Workarounds

• Implement IP-based access restrictions to limit who can access WordPress admin and AJAX endpoints
• Deploy a Web Application Firewall (WAF) with rules to block unauthorized access to plugin functions
• Temporarily disable the plugin until a patch can be applied if the functionality is not critical
• Use WordPress security plugins that can add capability checks to vulnerable endpoints

# Configuration example - restrict access to WordPress AJAX in nginx
location /wp-admin/admin-ajax.php {
    # Allow only authenticated admin access
    allow 192.168.1.0/24;  # Replace with your admin IP range
    deny all;
    
    # Or use basic auth as additional layer
    # auth_basic "Admin Area";
    # auth_basic_user_file /etc/nginx/.htpasswd;
}