CVE-2025-3487
📋 TL;DR
This vulnerability allows authenticated WordPress users with Contributor-level access or higher to inject malicious JavaScript into forms created with the Forminator plugin. The injected scripts execute whenever other users view the compromised pages, enabling session hijacking, credential theft, or content defacement. All WordPress sites using Forminator versions up to 1.42.0 are affected.
💻 Affected Systems
- Forminator Forms – Contact Form, Payment Form & Custom Form Builder for WordPress
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, take over the WordPress site, install backdoors, and compromise visitor data through persistent malicious scripts.
Likely Case
Attackers deface pages, redirect users to malicious sites, or steal user session cookies from visitors viewing compromised forms.
If Mitigated
With proper input validation and output escaping, the vulnerability is prevented, and only sanitized content is displayed to users.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once credentials are obtained; weaponization is likely due to the prevalence of WordPress and available attack frameworks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.42.1 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3274844/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Forminator and click 'Update Now'. 4. Verify the plugin version is 1.42.1 or higher.
🔧 Temporary Workarounds
Restrict User Roles
allTemporarily limit Contributor and higher roles from accessing the site until patched.
Disable Forminator Plugin
linuxDeactivate the plugin if forms are not critical, but this will break functionality.
wp plugin deactivate forminator
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules to block malicious payloads.
- Regularly audit user accounts and limit Contributor roles to trusted users only.
🔍 How to Verify
Check if Vulnerable:
Check the Forminator plugin version in WordPress admin under Plugins → Installed Plugins; if version is 1.42.0 or lower, it is vulnerable.Check Version:
wp plugin get forminator --field=versionVerify Fix Applied:
After updating, confirm the plugin version is 1.42.1 or higher in the same location.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to forminator endpoints with JavaScript in parameters
- Multiple failed login attempts followed by successful Contributor-level access
Network Indicators:
- Inbound traffic with suspicious script tags or encoded payloads to WordPress admin or form endpoints
SIEM Query:
source="wordpress.log" AND ("forminator" AND ("limit" OR "script" OR "alert"))🔗 References
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.41.2/assets/js/front/front.loader.js#L320
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.41.2/assets/js/front/front.multi.js#L1006
- https://plugins.trac.wordpress.org/changeset/3274844/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5039d63b-377d-435a-be31-4ae81ea30dd3?source=cve
