CVE-2025-68514: Paid Member Subscriptions Auth Bypass

CVE-2025-68514 Overview

CVE-2025-68514 is an Authorization Bypass Through User-Controlled Key vulnerability affecting the Cozmoslabs Paid Member Subscriptions WordPress plugin. This Insecure Direct Object Reference (IDOR) flaw allows authenticated attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized modification of resources they should not have access to.

The vulnerability stems from CWE-639 (Authorization Bypass Through User-Controlled Key), where the application uses user-supplied input to directly access objects without proper authorization checks. This allows low-privileged authenticated users to manipulate object references and bypass intended access restrictions.

Critical Impact

Authenticated attackers can bypass authorization controls and modify membership data or access restricted functionality within the Paid Member Subscriptions plugin, compromising the integrity of membership management systems.

Affected Products

• Paid Member Subscriptions WordPress Plugin versions through 2.16.8
• WordPress installations using the vulnerable paid-member-subscriptions plugin

Discovery Timeline

• 2026-02-20 - CVE-2025-68514 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2025-68514

Vulnerability Analysis

This vulnerability represents an Insecure Direct Object Reference (IDOR) condition where the Paid Member Subscriptions plugin fails to properly validate user authorization when accessing or modifying objects through user-controlled keys. The flaw allows authenticated users with low privileges to reference and manipulate objects belonging to other users or access administrative functions.

The vulnerability requires network access and a low-privileged authenticated session to exploit. While no user interaction is required for exploitation, the attack is limited in scope and primarily impacts data integrity rather than confidentiality or availability. The high integrity impact indicates that successful exploitation can result in significant unauthorized modifications to protected data.

Root Cause

The root cause is improper access control implementation in the plugin's object reference handling. When processing requests that involve user-controlled identifiers (such as subscription IDs, member IDs, or related database keys), the plugin fails to verify that the authenticated user has legitimate authorization to access or modify the referenced object. Instead of validating ownership or permission levels, the plugin directly uses the user-supplied key to perform operations.

Attack Vector

The attack vector is network-based, requiring the attacker to be authenticated with at least low-level privileges on the WordPress installation. The attacker manipulates object reference parameters in HTTP requests to access or modify resources belonging to other users or the system.

The exploitation process involves:

1. An attacker authenticates to WordPress with a valid low-privileged account
2. The attacker identifies requests that contain object reference parameters (subscription IDs, member IDs, etc.)
3. By modifying these parameters to reference other users' objects, the attacker bypasses authorization checks
4. The attacker can view or modify membership data, subscription statuses, or other protected information belonging to other users

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Advisory.

Detection Methods for CVE-2025-68514

Indicators of Compromise

• Unusual patterns of subscription or member data modifications by low-privileged users
• Sequential or iterative access attempts to subscription/member ID endpoints
• Log entries showing access to member resources by users who should not have permissions
• Unexpected changes to membership statuses, payment records, or subscription settings

Detection Strategies

• Implement web application firewall (WAF) rules to detect sequential ID enumeration patterns
• Enable detailed WordPress audit logging for the Paid Member Subscriptions plugin
• Monitor for authenticated users accessing subscription data outside their normal patterns
• Review access logs for parameter tampering indicators on membership-related endpoints

Monitoring Recommendations

• Configure real-time alerting for bulk or unusual membership data modifications
• Implement behavioral analysis to detect users accessing resources outside their scope
• Enable database-level auditing for the plugin's subscription and member tables
• Review HTTP request logs for anomalous object reference parameter patterns

How to Mitigate CVE-2025-68514

Immediate Actions Required

• Update the Paid Member Subscriptions plugin to a version newer than 2.16.8 when available
• Review membership and subscription data for unauthorized modifications
• Audit user accounts for suspicious activity patterns
• Consider temporarily restricting plugin functionality for low-privileged users until patched

Patch Information

Organizations should monitor the Patchstack Vulnerability Advisory and the official WordPress plugin repository for security updates. Apply the latest version of Paid Member Subscriptions as soon as a patched release becomes available.

Workarounds

• Implement additional authorization checks through custom WordPress hooks if technically feasible
• Restrict plugin access to trusted administrators only until patch is applied
• Enable WordPress security plugins with IDOR detection capabilities
• Use a Web Application Firewall (WAF) to monitor and block suspicious request patterns
• Disable unnecessary plugin features that expose object reference parameters

# WordPress plugin version check
wp plugin list --fields=name,version,status | grep paid-member-subscriptions

# Check for available updates
wp plugin update paid-member-subscriptions --dry-run

# Review recent plugin activity in WordPress
wp db query "SELECT * FROM wp_options WHERE option_name LIKE '%pms%' ORDER BY option_id DESC LIMIT 20"