Fluent Forms reflects param as executable script
Fluent Forms through 6.2.8 insufficiently sanitizes and escapes the unauthenticated param request value in its component rendering path. An attacker can create a link that executes JavaScript when a victim follows it; the record does not disclose the route or output context.
- Component
- Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
- Plugin slug
fluentform- Affected
- <= 6.2.8
- Safe version
6.2.9- Published
- Aug 01, 2026
This CVE was published Aug 01, 2026 and is one of 22 known issues for this plugin.
Update, patch or deactivate.
Update Fluent Forms to 6.2.9 or later. Review requests containing script-bearing param values and invalidate privileged sessions if an Administrator followed a confirmed link.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
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 Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'param' in all versions up to, and including, 6.2.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N