CVE-2026-100193Tutor LMS <= 4.1.0 - Reflected Cross-Site Scripting via 'tab' Parameter
Updated under an hour ago ()
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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.
- CVSS
- 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
themeum Tutor LMS – eLearning and online course solution themeum:tutor_lms_elearning_and_online_course_solution (from the name) | through 4.1.0 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4322fce1-0403-4458-82e3-7d374ab724c9?source=cve
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.9/templates/learning-area/lesson/content.php#L56
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.9/templates/learning-area/lesson/content.php#L27
- https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.9/classes/Lesson.php#L1018
- https://plugins.trac.wordpress.org/changeset/3730615/tutor/trunk/templates/learning-area/lesson/content.php
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.