Vulnerability Description
The Fluent Forms plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 6.1.21. This is due to the SubmissionPolicy class authorizing submission-level actions (read, modify, delete, add notes) based on a user-supplied `form_id` query parameter. This makes it possible for authenticated attackers, with Fluent Forms Manager access restricted to specific forms, to read, modify status, add notes to, and permanently delete form submissions belonging to any other form by spoofing the form_id parameter to a form they are authorized for.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/changeset?old_path=/fluentform/tags/6.1.21/ap
- https://www.wordfence.com/threat-intel/vulnerabilities/id/81aad41e-0330-4dff-a5f
FAQ
What is CVE-2026-5396?
CVE-2026-5396 is a vulnerability with a CVSS score of 8.2 (HIGH). The Fluent Forms plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 6.1.21. This is due to the SubmissionPolicy class authoriz...
How severe is CVE-2026-5396?
CVE-2026-5396 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-5396?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.