CVE-2025-67926: Fluent Support Auth Bypass Vulnerability

CVE-2025-67926 Overview

CVE-2025-67926 is a Missing Authorization vulnerability affecting the Fluent Support WordPress plugin developed by Shahjahan Jewel. This Broken Access Control flaw allows authenticated attackers to exploit incorrectly configured access control security levels, potentially gaining unauthorized access to sensitive support ticket data and administrative functions within WordPress environments.

The vulnerability stems from inadequate authorization checks within the plugin's functionality, enabling users with lower privileges to perform actions that should be restricted to administrators or support agents only.

Critical Impact

Authenticated attackers can bypass access controls to access, modify, or delete support ticket data, potentially exposing sensitive customer information and compromising the integrity of support operations.

Affected Products

• Fluent Support WordPress Plugin versions up to and including 1.10.4
• WordPress installations running vulnerable Fluent Support versions
• Sites using Fluent Support for customer support ticket management

Discovery Timeline

• 2026-01-08 - CVE-2025-67926 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-67926

Vulnerability Analysis

This vulnerability is classified under CWE-862 (Missing Authorization), indicating that the Fluent Support plugin fails to perform adequate authorization checks before allowing users to execute certain functions. The flaw requires network access and low-privilege authentication to exploit, meaning any authenticated WordPress user could potentially leverage this vulnerability.

The attack does not require user interaction, making it particularly dangerous in multi-user WordPress environments where various users have different permission levels. Successful exploitation can lead to complete compromise of confidentiality, integrity, and availability of the support ticket system.

Root Cause

The root cause of CVE-2025-67926 lies in missing authorization validation within the Fluent Support plugin's access control implementation. The plugin fails to properly verify whether authenticated users have the appropriate permissions before processing their requests. This allows users with minimal privileges (such as WordPress Subscribers) to access functionality intended only for administrators or support agents.

WordPress plugins must implement proper capability checks using functions like current_user_can() to verify user permissions. The absence or improper implementation of these checks in Fluent Support's codebase enables this broken access control vulnerability.

Attack Vector

The attack vector for this vulnerability is network-based with low complexity. An attacker needs only basic authentication to a WordPress site running the vulnerable plugin. The exploitation process typically involves:

1. Authenticating to the WordPress site with any valid user account
2. Crafting requests to Fluent Support endpoints that lack proper authorization checks
3. Accessing or manipulating support ticket data, user information, or administrative settings without proper permissions

The vulnerability requires no special configurations or user interaction, making exploitation straightforward for any authenticated user. For detailed technical information, refer to the Patchstack Vulnerability Advisory.

Detection Methods for CVE-2025-67926

Indicators of Compromise

• Unexpected access to support tickets by users without support agent roles
• Audit logs showing unauthorized API calls to Fluent Support endpoints
• Changes to support ticket data or settings made by low-privileged users
• Anomalous patterns of access to support-related database tables

Detection Strategies

• Review WordPress user activity logs for access to Fluent Support administrative functions by non-authorized users
• Monitor HTTP requests to Fluent Support plugin endpoints for suspicious patterns from low-privileged sessions
• Implement file integrity monitoring on the Fluent Support plugin directory to detect unauthorized modifications
• Enable WordPress debug logging to capture permission-related errors and unauthorized access attempts

Monitoring Recommendations

• Configure WordPress security plugins to alert on privilege escalation attempts
• Establish baseline access patterns for support ticket functionality and alert on deviations
• Monitor database queries to Fluent Support tables for access from unexpected user contexts
• Implement web application firewall (WAF) rules to detect common broken access control exploitation patterns

How to Mitigate CVE-2025-67926

Immediate Actions Required

• Update Fluent Support plugin to the latest patched version immediately
• Audit user accounts with access to the WordPress installation and remove unnecessary accounts
• Review support ticket access logs for signs of unauthorized access or data exfiltration
• Consider temporarily disabling the Fluent Support plugin if immediate patching is not possible

Patch Information

Users should update the Fluent Support plugin to a version newer than 1.10.4 that addresses this missing authorization vulnerability. Check the official WordPress plugin repository or the vendor's website for the latest secure release. Additional technical details and patch information can be found in the Patchstack Vulnerability Advisory.

Workarounds

• Restrict WordPress user registration and remove unnecessary user accounts until the plugin is patched
• Implement additional access controls at the web server level to limit access to Fluent Support endpoints
• Use a web application firewall (WAF) to monitor and block suspicious requests to the plugin
• Consider using WordPress capability management plugins to add additional permission layers

# Configuration example - Restrict access to Fluent Support admin endpoints via .htaccess
# Add to WordPress root .htaccess file

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^.*fluent-support.*$ [NC]
RewriteCond %{REMOTE_ADDR} !^192\.168\.1\. [NC]
RewriteRule ^(.*)$ - [F,L]
</IfModule>

# Note: Adjust IP ranges to match your administrative network
# This is a temporary workaround - patching is the recommended solution