CVE-2026-19712
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
The Masteriyo LMS WordPress plugin before version 2.3.3 does not sanitize and escape a quiz field before output, and grants instructors the ability to store unfiltered HTML, allowing Stored XSS attacks against any visitor, including administrators. Default single-site installations are affected; multisite or DISALLOW_UNFILTERED_HTML sites are not.
Risk Assessment
The risk includes admin session hijacking, data theft, and content modification via malicious scripts in victims' browsers.
Recommendation
Update the plugin to version 2.3.3 or later and restrict instructor role capabilities if possible.
Other vulnerabilities in Masteriyo LMS
See all- CVE-2026-65463Medium
The Masteriyo - LMS plugin version 2.3.1 and earlier contains an Insecure Direct Object References (IDOR) vulnerability exploitable by a subscriber. A subscriber can access other users' resources.
- CVE-2026-59513Medium
Masteriyo - LMS plugin version 2.3.0 and earlier is vulnerable to Cross Site Scripting (XSS) from a subscriber level. A subscriber can inject malicious script.
- CVE-2026-73996Critical
Unauthenticated Arbitrary File Upload vulnerability in Masteriyo - LMS plugin versions up to 2.3.2. An attacker without authentication can upload arbitrary files to the server.
- CVE-2026-13332Critical
The Masteriyo LMS WordPress plugin before 2.3.1 does not correctly verify authorization on an unauthenticated AJAX action used to clear user sessions, allowing unauthenticated attackers to terminate the active sessions (force-logout) of any user on the site, including administrators.
- CVE-2026-62132Medium
The Masteriyo - LMS plugin in versions up to and including 3.4.0 contains a Broken Access Control vulnerability. A user with the Subscriber role can perform actions beyond their granted permissions.
- CVE-2026-62107High
The Masteriyo - LMS plugin in versions up to and including 3.4.0 contains an Unauthenticated PHP Object Injection vulnerability. An attacker can inject a malicious PHP object, potentially leading to further attacks such as remote code execution.
- CVE-2026-82848Medium
The Masteriyo LMS WordPress plugin before version 3.4.0 does not perform any authorization check before returning a course enrolment record over its REST API, allowing unauthenticated users to read any learner's enrolment status, timestamps and course-progress data by walking sequential record identifiers. A related gap lets any enrolled user retrieve other learners' enrolment records as well.
- CVE-2026-8279Medium
The Masteriyo LMS plugin for WordPress up to version 2.2.0 is vulnerable to unauthorized data deletion due to a missing capability check in the 'delete_item_permissions_check' function in CourseProgressItemsController. This allows unauthenticated attackers to delete arbitrary course progress records belonging to any student.
- CVE-2026-11773Medium
The Masteriyo LMS plugin for WordPress up to version 2.2.1 contains an authorization bypass vulnerability. Authenticated attackers with student-level access or higher can modify the content of course announcements created by instructors or administrators.
- CVE-2026-42743Medium
Masteriyo - LMS versions up to 2.1.8 contain a vulnerability in authentication that allows unauthorized access.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS