CVE-2024-49328
📋 TL;DR
This vulnerability allows attackers to bypass authentication in the WP REST API FNS WordPress plugin, potentially gaining unauthorized access to administrative functions. It affects all WordPress sites running the plugin version 1.0.0 or earlier. Attackers could exploit this to take over accounts or perform unauthorized actions.
💻 Affected Systems
- WordPress WP REST API FNS plugin
📦 What is this software?
Wp Rest Api Fns by Vivektamrakar
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover where attackers gain administrative privileges, modify content, install backdoors, steal sensitive data, or deface the website.
Likely Case
Unauthorized access to user accounts, privilege escalation, data theft, or content manipulation by attackers exploiting the authentication bypass.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and monitoring are in place to detect and block exploitation attempts.
🎯 Exploit Status
Authentication bypass vulnerabilities are typically easy to exploit once the attack vector is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.1 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/rest-api-fns/wordpress-wp-rest-api-fns-plugin-plugin-1-0-0-account-takeover-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'WP REST API FNS' plugin. 4. Click 'Update Now' if update is available. 5. If no update appears, manually download version 1.0.1+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the WP REST API FNS plugin until patched
wp plugin deactivate rest-api-fns
Restrict API access
allUse web application firewall to block suspicious REST API requests
🧯 If You Can't Patch
- Disable the WP REST API FNS plugin immediately
- Implement strict network access controls and monitor for unauthorized API requests
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for 'WP REST API FNS' version 1.0.0 or earlierCheck Version:
wp plugin get rest-api-fns --field=versionVerify Fix Applied:
Verify plugin version is 1.0.1 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual REST API authentication attempts
- Multiple failed login attempts followed by successful authentication from same IP
- Administrative actions from unexpected user accounts
Network Indicators:
- Suspicious POST/GET requests to /wp-json/fns/ endpoints
- Authentication bypass attempts in HTTP headers or parameters
SIEM Query:
source="wordpress.log" AND ("rest-api-fns" OR "fns/" OR "authentication bypass")