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CVE-2026-18146

HIGH 7.2 CVSS 3.1
Published
August 13, 2026
Last modified
August 14, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Notification Smartcode Values in all versions up to, and including, 6.2.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in the browser of an administrator (or any user with the Fluent Forms entry-viewing capability) when they view the form's entry Submission Logs in the WordPress admin dashboard. Exploitation requires that a site administrator or Fluent Forms manager has configured an email notification whose subject or static (direct) Send To value references an attacker-influenced Smartcode such as an input_password field value, a cookie value, or submission.response.

Affected WordPress components

  • Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder Plugin · fluentform
    Confirmed match Active
    Up to and including 6.2.11
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • wpmanageninja Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder — Up to and including 6.2.11

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/Notifications/EmailNotification.php#L196
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/ShortCodeParser.php#L142
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/ShortCodeParser.php#L145
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/assets/js/form_entries.js#L2
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/boot/globals.php#L98
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3640683/fluentform/trunk/app/Services/FormBuilder/ShortCodeParser.php
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.11&new_path=%2Ffluentform/tags/6.2.12
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&new=3640683%40fluentform%2Ftags%2F6.2.12&old=3632883%40fluentform%2Ftags%2F6.2.11
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/643f92e2-b14e-4056-97fc-1c631027c54f?source=cve
  • nvd.nist.gov Official NVD record