CVE-2025-14043
📋 TL;DR
The Tainacan WordPress plugin has an authorization bypass vulnerability that allows unauthenticated attackers to create arbitrary metadata sections for any collection via the public REST API. This affects all WordPress sites running Tainacan plugin versions up to and including 1.0.1. The vulnerability exists because the create_item_permissions_check() function unconditionally returns true, bypassing all authentication checks.
💻 Affected Systems
- Tainacan WordPress Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could create malicious metadata sections to manipulate data structures, potentially enabling data corruption, privilege escalation, or creating backdoors for further attacks.
Likely Case
Unauthorized users create spam or malicious metadata sections, disrupting data organization and potentially enabling cross-site scripting or other injection attacks through metadata fields.
If Mitigated
With proper network controls and authentication requirements, impact is limited to authenticated users only, preventing unauthenticated exploitation.
🎯 Exploit Status
Exploitation requires only HTTP POST requests to the vulnerable REST API endpoint. No authentication or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.2 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/tainacan/tags/1.0.2
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Tainacan plugin. 4. Click 'Update Now' if update available. 5. If no update available, download version 1.0.2+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Disable Tainacan REST API Endpoint
allBlock access to the vulnerable REST API endpoint using web server configuration or firewall rules.
# Apache: Add to .htaccess
RewriteRule ^wp-json/tainacan/v1/metadata-sections - [F,L]
# Nginx: Add to server block
location ~* ^/wp-json/tainacan/v1/metadata-sections { deny all; }
Require Authentication for REST API
allConfigure WordPress to require authentication for all REST API endpoints.
# Add to wp-config.php
define('REST_API_AUTH_REQUIRED', true);
🧯 If You Can't Patch
- Disable Tainacan plugin completely until patched
- Implement WAF rules to block POST requests to /wp-json/tainacan/v1/metadata-sections
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Tainacan. If version is 1.0.1 or lower, system is vulnerable.Check Version:
# WordPress CLI
wp plugin get tainacan --field=version
# Or check file
cat wp-content/plugins/tainacan/tainacan.php | grep 'Version:'Verify Fix Applied:
After update, verify Tainacan plugin version shows 1.0.2 or higher in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-json/tainacan/v1/metadata-sections from unauthenticated users
- Multiple 200/201 responses to metadata section creation endpoints from single IP
Network Indicators:
- HTTP POST requests to /wp-json/tainacan/v1/metadata-sections without authentication headers
- Unusual traffic patterns to WordPress REST API endpoints
SIEM Query:
source="web_server" AND (uri_path="/wp-json/tainacan/v1/metadata-sections" OR uri_path CONTAINS "tainacan") AND http_method="POST" AND (user_agent NOT CONTAINS "wordpress" OR auth_token="")🔗 References
- https://plugins.trac.wordpress.org/browser/tainacan/tags/1.0.1/classes/api/endpoints/class-tainacan-rest-metadata-sections-controller.php#L363
- https://plugins.trac.wordpress.org/browser/tainacan/trunk/classes/api/endpoints/class-tainacan-rest-metadata-sections-controller.php#L363
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5596a0f0-6bfe-4c6e-a0d6-117e13117098?source=cve
