Responsive Contact Form Builder & Lead Generation Plugin: Cross-site scripting
Responsive Contact Form Builder & Lead Generation Plugin is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed.
- Component
- Responsive Contact Form Builder & Lead Generation Plugin
- Plugin slug
lead-form-builder- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Mar 11, 2026
This CVE was published Mar 11, 2026 and is one of 7 known issues for this plugin.
Update, patch or deactivate.
Update Responsive Contact Form Builder & Lead Generation Plugin to a release outside the affected range, or disable and remove it until a fixed version is available.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Responsive Contact Form Builder & Lead Generation Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.0.1 via form field submissions. This is due to insufficient input sanitization in the lfb_lead_sanitize() function which omits certain field types from its sanitization whitelist, combined with an overly permissive wp_kses() filter at output time that allows onclick attributes on anchor tags. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator views the lead entries in the WordPress dashboard.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N