CVE-2026-6828: Fluent Forms <= 6.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'permission_message' Shortcode Attribute
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'permissionmessage' parameter in all versions up to, and including, 6.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-6828?
CVE-2026-6828 is categorized as a medium severity vulnerability due to its potential for stored cross-site scripting attacks.
How do I fix CVE-2026-6828?
To mitigate CVE-2026-6828, update the Fluent Forms plugin to version 6.2.2 or later.
Who is affected by CVE-2026-6828?
CVE-2026-6828 affects users of the Fluent Forms plugin for WordPress versions 6.2.1 and earlier.
What type of vulnerability is CVE-2026-6828?
CVE-2026-6828 is an authenticated stored cross-site scripting vulnerability that can be exploited via the 'permission_message' shortcode attribute.
Can CVE-2026-6828 be exploited remotely?
Yes, CVE-2026-6828 can be exploited remotely by authenticated users with Contributor or higher roles.