CVE-2026-11773

Masteriyo LMS <= 2.2.1 - Missing Authorization to Authenticated (Student+) Arbitrary Course Announcement Modification

2026-06-26 17:55
ilinor

Strategic Overview

Status
Patched in 2.3.0
Affected Plugin
Masteriyo LMS – LMS Course Builder, Quizzes & Certificates
Affected Version
<= 2.2.1
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-11773
View all Masteriyo LMS – LMS Course Builder, Quizzes & Certificates vulnerabilities

At a glance

CVE-2026-11773 is a medium-severity Missing Authorization vulnerability in the Masteriyo LMS WordPress plugin, affecting versions <= 2.2.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Student level or above. The issue is fixed in version 2.3.0; sites on affected versions should update now. Disclosed June 2026, reported by ilinor.

Vulnerability Overview

The Masteriyo LMS – LMS Course Builder, Quizzes & Certificates plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.2.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with student-level access and above, to modify the description (post content) of arbitrary course announcements authored by instructors or administrators.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Masteriyo LMS <= 2.2.1 takes an account at Student level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Masteriyo LMS the fix is 2.3.0: builds <= 2.2.1 are affected, anything from 2.3.0 onward is not.

Remediation

Update to version 2.3.0, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Masteriyo LMS 2.3.0 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-11773https://www.wordfence.com/threat-intel/vulnerabilities/id/5780d762-2313-4c81-be02-99543359d824https://nvd.nist.gov/vuln/detail/CVE-2026-11773

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C