CVE-2024-6521: Fluentforms Contact Form

Medium severity, CVSS 4.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dropdown fields in all versions up to, and including, 5.1.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• Fluentforms Contact Form: before 5.1.20 (fixed in 5.1.20)

Published 2024-07-27. Last modified 2026-06-17.