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CVE-2026-82846mediumCWE-79

Masteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom Fields

33Vexday Risk Score

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

ssvc Attendcvss 6.8epss 0.2%
exploitation probability
0.2%top 85% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
The Masteriyo LMS WordPress plugin before 3.4.0 does not sanitise and escape some course settings before outputting them in a page available to all visitors, allowing users with a course-author role to perform Stored Cross-Site Scripting attacks that run in the session of anyone viewing the course, including a logged-in administrator.
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.