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CVE-2026-100193

MEDIUM 4.7 CVSS 3.1
Published
October 14, 2026
Last modified
October 14, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'tab' parameter in all versions up to, and including, 4.1.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the targeted lesson page to have an empty nav-items array — a condition that occurs naturally when a lesson has no post content, no attachments, and comments are disabled or the viewer is not logged in — which bypasses the in_array() tab validation and allows the raw attacker-controlled value to reach the sink.

Affected WordPress components

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

  • themeum Tutor LMS – eLearning and online course solution — Up to and including 4.1.0

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.9/classes/Lesson.php#L1018
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.9/templates/learning-area/lesson/content.php#L27
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.9/templates/learning-area/lesson/content.php#L56
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3730615/tutor/trunk/templates/learning-area/lesson/content.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/4322fce1-0403-4458-82e3-7d374ab724c9?source=cve
  • nvd.nist.gov Official NVD record