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.
History

Mon, 17 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Masteriyo
Masteriyo masteriyo
Wordpress
Wordpress wordpress
Vendors & Products Masteriyo
Masteriyo masteriyo
Wordpress
Wordpress wordpress

Sun, 16 Aug 2026 07:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Sun, 16 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Masteriyo LMS < 2.3.3 - Instructor+ Stored XSS via Quiz Description
References

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published: 2026-08-16T06:00:16.021Z

Updated: 2026-08-17T20:01:58.232Z

Reserved: 2026-08-13T11:05:28.685Z

Link: CVE-2026-19712

cve-icon Vulnrichment

Updated: 2026-08-17T20:01:53.427Z

cve-icon NVD

Status : Received

Published: 2026-08-16T06:16:52.207

Modified: 2026-08-17T20:16:42.020

Link: CVE-2026-19712

cve-icon Redhat

No data.