What’s Vulnerable › Vulnerabilities

CVE-2024-4709: Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder <= 5.1.16 - Authenticated (Contributor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-18 · updated 2026-06-17
• Weakness: CWE-79

Description

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 the ‘subject’ parameter in versions up to, and including, 5.1.16 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, and access granted by an administrator, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder: before 5.1.17 — fixed in 5.1.17

How to fix

Upgrade to a fixed version: techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder 5.1.17. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Services/FormBuilder/Notifications/EmailNotification.php#L106
• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Services/FormBuilder/Notifications/EmailNotification.php#L164
• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Services/FormBuilder/Notifications/EmailNotification.php#L194
• https://plugins.trac.wordpress.org/changeset/3088078/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/5fe317a6-a391-441a-aac8-c8fa57e73169?source=cve
• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Services/FormBuilder/Notifications/EmailNotification.php#L106
• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Services/FormBuilder/Notifications/EmailNotification.php#L164
• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Services/FormBuilder/Notifications/EmailNotification.php#L194
• https://plugins.trac.wordpress.org/changeset/3088078/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/5fe317a6-a391-441a-aac8-c8fa57e73169?source=cve

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