CVE-2026-82847mediumCWE-79

CVE-2026-82847: medium-severity vulnerability in Masteriyo LMS

Masteriyo LMS < 3.4.1 - Instructor+ Stored XSS via Course Highlights

Published

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.8epss 0.4%
The Masteriyo LMS WordPress plugin before 3.4.1 does not sanitise and escape one of its course fields before outputting it back in the course editor, allowing users with the instructor role to perform Stored Cross-Site Scripting attacks against higher privileged users such as administrators.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Affected products
Unknown · Masteriyo LMS
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Masteriyo LMS

In the same product, most dangerous first.

CVE-2026-82845CRITICALMasteriyo LMS < 3.4.1 - Subscriber+ PHP Object InjectionEPSS 0.6%CVE-2026-82846MEDIUMMasteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom FieldsEPSS 0.4%CVE-2026-13332CRITICALMasteriyo LMS < 2.3.1 - Unauthenticated Arbitrary User Session Termination (Denial of Service)EPSS 0.4%CVE-2026-82848MEDIUMMasteriyo LMS 1.3.1 - 2.3.3 - Unauthenticated Course Enrollment DisclosureEPSS 0.3%CVE-2026-82851LOWMasteriyo LMS 1.14.0 - 3.4.0 - Instructor+ Arbitrary Post Disclosure via IDOREPSS 0.3%CVE-2026-10824MEDIUMMasteriyo LMS < 2.2.1 - Unauthenticated Course Progress Disclosure and DeletionEPSS 0.3%