What’s Vulnerable › Vulnerabilities

CVE-2021-34620: CSRF in WP Fluent Forms < 3.6.67 allows stored XSS and Privilege Escalation

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-07-07 · updated 2026-06-17
• Weakness: CWE-79

Description

The WP Fluent Forms plugin < 3.6.67 for WordPress is vulnerable to Cross-Site Request Forgery leading to stored Cross-Site Scripting and limited Privilege Escalation due to a missing nonce check in the access control function for administrative AJAX actions

Affected products

• techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder: before 3.6.67 — fixed in 3.6.67

How to fix

Upgrade to a fixed version: techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder 3.6.67. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Modules/Acl/Acl.php?rev=2196688
• https://www.wordfence.com/blog/2021/06/cross-site-request-forgery-patched-in-wp-fluent-forms/
• https://plugins.trac.wordpress.org/browser/fluentform/trunk/app/Modules/Acl/Acl.php?rev=2196688
• https://www.wordfence.com/blog/2021/06/cross-site-request-forgery-patched-in-wp-fluent-forms/

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