CVE-2026-19712mediumCWE-79

CVE-2026-19712: medium-severity vulnerability in Masteriyo LMS

Masteriyo LMS < 2.3.3 - Instructor+ Stored XSS via Quiz Description

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33Vexday Risk Score

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

ssvc Attendcvss 6.1epss 0.3%
The Masteriyo LMS WordPress plugin before 2.3.3 does not sanitise and escape a quiz field before outputting it back in a page, and grants its instructor role the ability to store unfiltered HTML, allowing such users to perform Stored Cross-Site Scripting attacks against any visitor of the affected page, including administrators. This affects default single-site installations. Sites running multisite, or defining DISALLOW_UNFILTERED_HTML, are not affected as the capability is not granted there.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
Unknown · Masteriyo LMS
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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