CVE-2025-13728
📋 TL;DR
This vulnerability allows authenticated WordPress users with contributor-level access or higher to inject malicious scripts into website pages via the FluentAuth plugin's password reset shortcode. When other users visit pages containing these injected scripts, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using FluentAuth plugin versions up to 2.0.3 are affected.
💻 Affected Systems
- FluentAuth – The Ultimate Authorization & Security Plugin for WordPress
⚠️ 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 steal administrator credentials, take over the WordPress site, install backdoors, deface the site, or redirect users to malicious websites.
Likely Case
Attackers with contributor access inject malicious scripts to steal user session cookies, perform actions as other users, or display phishing content.
If Mitigated
With proper user access controls and content security policies, impact is limited to isolated script execution without persistent compromise.
🎯 Exploit Status
Exploitation requires contributor-level access but is technically simple once authenticated. The vulnerability is in a widely used WordPress plugin.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.0
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3409232/fluent-security/tags/2.1.0/app/Hooks/Handlers/CustomAuthHandler.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find FluentAuth plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 2.1.0 from WordPress plugin repository and manually update.
🔧 Temporary Workarounds
Disable FluentAuth plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate fluent-security
Remove contributor role access
allTemporarily restrict contributor-level users from accessing the site
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to prevent script execution
- Regularly audit user accounts and remove unnecessary contributor-level permissions
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → FluentAuth version. If version is 2.0.3 or lower, you are vulnerable.Check Version:
wp plugin get fluent-security --field=versionVerify Fix Applied:
After updating, verify FluentAuth plugin shows version 2.1.0 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to pages containing 'fluent_auth_reset_password' shortcode
- Multiple failed login attempts followed by successful contributor-level login
Network Indicators:
- Unexpected JavaScript payloads in page responses containing FluentAuth shortcodes
SIEM Query:
source="wordpress.log" AND ("fluent_auth_reset_password" OR "contributor" AND "script")