Stored Cross-Site Scripting in Fluent Forms by WP Fluent Forms
CVE-2026-6828

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
Vendor
CVE Published:
13 May 2026

What is CVE-2026-6828?

The Fluent Forms plugin for WordPress suffers from a Stored Cross-Site Scripting flaw through the 'permission_message' parameter. This vulnerability arises from inadequate input sanitization and output escaping, allowing authenticated attackers with contributor-level access or higher to inject malicious web scripts into affected pages. These scripts could execute when other users access the compromised pages, posing a serious security risk.

Affected Version(s)

Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder 0 <= 6.2.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/fluentform/tru...
https://plugins.trac.wordpress.org/browser/fluentform/tag...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Djaidja Moundjid
.