CVE-2025-68534: PDF for WPForms Auth Bypass Vulnerability

CVE-2025-68534 Overview

CVE-2025-68534 is a Missing Authorization vulnerability affecting the PDF for WPForms WordPress plugin developed by add-ons.org. This security flaw allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within WordPress installations using this plugin. The vulnerability stems from insufficient authorization checks that fail to properly validate user permissions before allowing sensitive operations.

Critical Impact

Unauthorized users with low-level privileges can bypass access controls and perform high-integrity modifications to the PDF generation functionality in WPForms, potentially compromising form data integrity across WordPress sites.

Affected Products

• PDF for WPForms plugin versions up to and including 6.3.0
• WordPress installations utilizing the vulnerable PDF for WPForms plugin
• Sites relying on WPForms integration with PDF generation capabilities

Discovery Timeline

• 2026-02-20 - CVE CVE-2025-68534 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2025-68534

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), indicating that the PDF for WPForms plugin fails to perform adequate authorization checks before executing privileged operations. The flaw allows authenticated users with minimal privileges to access and manipulate functionality that should be restricted to administrators or higher-privileged roles.

The attack requires network access and low-level authentication (such as a subscriber account), but does not require user interaction. While the vulnerability does not expose confidential data or cause service disruption, it enables high-impact integrity modifications to the affected system's PDF generation configuration and related WPForms settings.

Root Cause

The root cause of this vulnerability lies in the plugin's failure to implement proper capability checks on sensitive AJAX endpoints or administrative functions. The PDF for WPForms plugin does not adequately verify that the requesting user has sufficient permissions before processing actions that modify PDF templates, settings, or form-to-PDF mappings. This broken access control implementation allows any authenticated WordPress user to perform administrative actions.

Attack Vector

The vulnerability is exploitable over the network by any authenticated WordPress user, regardless of their assigned role. An attacker with a basic subscriber account can craft requests to vulnerable plugin endpoints that lack proper authorization verification. The attack does not require any user interaction and can be executed directly against the WordPress REST API or AJAX handlers.

The exploitation path typically involves:

1. Authenticating to the WordPress site with any valid user credentials
2. Identifying vulnerable plugin endpoints that lack authorization checks
3. Sending crafted requests to modify PDF generation settings or configurations
4. Successfully bypassing intended access restrictions to alter system integrity

For detailed technical analysis of this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-68534

Indicators of Compromise

• Unexpected modifications to PDF for WPForms plugin settings by non-administrator users
• Unusual AJAX or REST API requests targeting PDF plugin endpoints from low-privileged accounts
• Audit log entries showing configuration changes made by subscriber or contributor roles
• Anomalous activity patterns in WordPress admin-ajax.php requests related to PDF generation

Detection Strategies

• Monitor WordPress audit logs for unauthorized access attempts to plugin administrative functions
• Implement web application firewall (WAF) rules to detect and block suspicious requests to PDF for WPForms endpoints
• Review user activity logs for privilege escalation patterns or unexpected role-based access violations
• Deploy endpoint detection to identify exploitation attempts targeting WordPress plugin vulnerabilities

Monitoring Recommendations

• Enable comprehensive WordPress activity logging to capture all plugin configuration changes
• Configure alerts for any modifications to PDF for WPForms settings made by non-administrator accounts
• Implement real-time monitoring of AJAX request patterns to identify potential access control bypass attempts
• Regularly audit user permissions and plugin access logs for signs of compromise

How to Mitigate CVE-2025-68534

Immediate Actions Required

• Update PDF for WPForms plugin to a version newer than 6.3.0 once a patched release becomes available
• Review and restrict WordPress user roles to minimize the number of authenticated accounts
• Implement additional access control measures at the web server or WAF level
• Audit recent activity logs for signs of exploitation and unauthorized changes

Patch Information

Organizations should monitor the plugin vendor (add-ons.org) for security updates addressing this vulnerability. Review the Patchstack Vulnerability Report for the latest remediation guidance. Until an official patch is available, consider temporarily disabling the plugin or implementing compensating controls.

Workarounds

• Temporarily disable the PDF for WPForms plugin if PDF generation is not business-critical
• Restrict WordPress user registration to prevent unauthorized accounts from being created
• Implement IP-based access restrictions for WordPress administrative functions
• Use a security plugin to add capability checks or restrict access to vulnerable endpoints

# WordPress configuration to restrict user registration
# Add to wp-config.php to disable new user registration
define('USERS_CAN_REGISTER', false);

# .htaccess rule to restrict admin-ajax.php access (use with caution)
# This is a temporary mitigation - test thoroughly before deployment
<FilesMatch "admin-ajax.php">
    Order Deny,Allow
    Deny from all
    Allow from 127.0.0.1
    Allow from YOUR_ADMIN_IP
</FilesMatch>