CVE-2026-100193 json
Tutor LMS <= 4.1.0 - Reflected Cross-Site Scripting via 'tab' Parameter
published 2026-10-14 26 d ago modified 2026-10-14 25 d ago also EUVD-2026-100787
- cvss
- 4.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 25 d ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected products
- themeum Tutor LMS – eLearning and online course solution
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4322fce1-0403-4458-82e3-7d374ab724c9?source=cve
- plugins.trac.wordpress.org /browser/tutor/tags/4.0.9/templates/learning-area/lesson/content.php#L56
- plugins.trac.wordpress.org /browser/tutor/tags/4.0.9/templates/learning-area/lesson/content.php#L27
- plugins.trac.wordpress.org /browser/tutor/tags/4.0.9/classes/Lesson.php#L1018
- plugins.trac.wordpress.org /changeset/3730615/tutor/trunk/templates/learning-area/lesson/content.php
Sources
- CVE List CVE-2026-100193
- NVD CVE-2026-100193
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.