CVE-2026-82847

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

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.

Affected

Masteriyo LMS

CVSS v3.1 CNA

6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

EPSS

0.43% chance of exploitation in the next 30 days, 36th percentile

Published

2026-09-12

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/9cc4f7a7-e5b9-48fe-962b-f5d0753e6158/

References

• CVE Record
• NVD entry