CVE-2024-2771
📋 TL;DR
This vulnerability allows unauthenticated attackers to escalate privileges in the Fluent Forms WordPress plugin by accessing a REST API endpoint without proper authorization checks. Attackers can grant Fluent Form management permissions to users or delete manager accounts, potentially gaining full control over the plugin's settings and features. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder
📦 What is this software?
Contact Form by Fluentforms
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Fluent Forms plugin functionality, allowing attackers to manipulate all forms, surveys, and quizzes; exfiltrate submitted data; and potentially use the plugin as a foothold for further WordPress compromise.
Likely Case
Attackers gain Fluent Forms management access, allowing them to view and modify all form submissions, change form configurations, and potentially access sensitive user data submitted through forms.
If Mitigated
With proper network segmentation and web application firewalls, exploitation attempts are blocked before reaching the vulnerable endpoint, limiting impact to isolated plugin functionality.
🎯 Exploit Status
Exploitation requires only HTTP requests to the vulnerable REST endpoint with appropriate parameters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.1.17 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3088078/fluentform/trunk/app/Http/Policies/RoleManagerPolicy.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Fluent Forms plugin. 4. Click 'Update Now' if available, or download version 5.1.17+ from WordPress.org. 5. Activate the updated plugin.
🔧 Temporary Workarounds
Block vulnerable REST endpoint
allAdd web application firewall rule or .htaccess directive to block access to the vulnerable endpoint
# .htaccess example: RewriteRule ^wp-json/fluentform/v1/managers - [F,L]
Disable plugin temporarily
linuxDeactivate Fluent Forms plugin until patched
wp plugin deactivate fluentform
🧯 If You Can't Patch
- Implement strict network access controls to limit access to WordPress admin and REST API endpoints
- Deploy web application firewall with rules to detect and block privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Fluent Forms version. If version ≤5.1.16, system is vulnerable.Check Version:
wp plugin get fluentform --field=versionVerify Fix Applied:
Confirm plugin version is 5.1.17 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /wp-json/fluentform/v1/managers from unauthenticated users
- Unusual user role changes in WordPress user management logs
Network Indicators:
- Unusual traffic patterns to WordPress REST API endpoints
- POST requests to /wp-json/fluentform/v1/managers from external IPs
SIEM Query:
source="wordpress" AND (uri_path="/wp-json/fluentform/v1/managers" OR event_description="user role change")🔗 References
- https://plugins.trac.wordpress.org/changeset/3088078/fluentform/trunk/app/Http/Policies/RoleManagerPolicy.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/071195d6-3452-4241-a8d3-92efc84e4850?source=cve
- https://plugins.trac.wordpress.org/changeset/3088078/fluentform/trunk/app/Http/Policies/RoleManagerPolicy.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/071195d6-3452-4241-a8d3-92efc84e4850?source=cve
