CVE-2024-2782
📋 TL;DR
This vulnerability allows unauthenticated attackers to modify all settings of the Fluent Forms WordPress plugin via a REST API endpoint lacking proper authorization checks. All WordPress sites using Fluent Forms versions up to 5.1.16 are affected, potentially compromising form functionality and site security.
💻 Affected Systems
- Fluent Forms - Contact Form, Quiz, Survey, & Drag & Drop WP Form Builder
📦 What is this software?
Contact Form by Fluentforms
⚠️ Risk & Real-World Impact
Worst Case
Attackers could disable security features, inject malicious code into forms, redirect submissions to malicious sites, or completely break form functionality across the entire WordPress site.
Likely Case
Attackers modify form settings to capture sensitive user data, redirect form submissions, or inject malicious scripts that affect site visitors.
If Mitigated
With proper network controls and updated plugins, impact is limited to attempted attacks that are blocked or logged.
🎯 Exploit Status
Simple HTTP POST requests to the vulnerable endpoint can modify settings without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.1.17
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3088078/fluentform/trunk/app/Http/Policies/GlobalSettingsPolicy.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 update is available. 5. Alternatively, download version 5.1.17+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Block Vulnerable REST Endpoint
allUse web application firewall or .htaccess to block access to the vulnerable API endpoint
# Add to .htaccess
RewriteEngine On
RewriteRule ^wp-json/fluentform/v1/global-settings - [F,L]
Disable Plugin
linuxTemporarily disable Fluent Forms plugin until patched
wp plugin deactivate fluentform
🧯 If You Can't Patch
- Disable the Fluent Forms plugin entirely until patching is possible.
- Implement strict network controls to block external access to /wp-json/fluentform/v1/ endpoints.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Fluent Forms version. If version is 5.1.16 or lower, you are vulnerable.Check Version:
wp plugin list --name=fluentform --field=versionVerify Fix Applied:
Verify Fluent Forms plugin version is 5.1.17 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- POST requests to /wp-json/fluentform/v1/global-settings from unauthenticated users
- Unusual modifications to Fluent Forms settings or configurations
Network Indicators:
- Unusual POST requests to WordPress REST API endpoints from external IPs
- Traffic patterns showing form setting modifications
SIEM Query:
source="web_server" AND (uri_path="/wp-json/fluentform/v1/global-settings" AND http_method="POST")🔗 References
- https://plugins.trac.wordpress.org/changeset/3088078/fluentform/trunk/app/Http/Policies/GlobalSettingsPolicy.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0814e7b3-404a-4db5-b564-46c9086ec048?source=cve
- https://plugins.trac.wordpress.org/changeset/3088078/fluentform/trunk/app/Http/Policies/GlobalSettingsPolicy.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0814e7b3-404a-4db5-b564-46c9086ec048?source=cve
