CVE-2026-100193

Tutor LMS <= 4.1.0 - Reflected Cross-Site Scripting via 'tab' Parameter

Published Oct 14, 2026 CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Themeum
Themeum tutor Lms
Wordpress-extensions
Wordpress-extensions tutor Lms
Vendors & Products Themeum
Themeum tutor Lms
Wordpress-extensions
Wordpress-extensions tutor Lms
Type Values Removed Values Added
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.
Title Tutor LMS <= 4.1.0 - Reflected Cross-Site Scripting via 'tab' Parameter
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Oct 14, 2026, 5:51 PM
Reserved
Sep 25, 2026, 2:25 PM
Status
Deferred
Published
Oct 14, 2026, 4:18 AM
Modified
Oct 14, 2026, 6:17 PM