CVE-2026-62132 Overview
CVE-2026-62132 is a broken access control vulnerability in the Masteriyo LMS (Learning Management System) WordPress plugin. The flaw affects Masteriyo LMS versions 3.4.0 and earlier. An unauthenticated remote attacker can abuse the vulnerability over the network without user interaction. Successful exploitation yields limited integrity impact but no confidentiality or availability impact.
The vulnerability is classified under [CWE-862] Missing Authorization, indicating that the plugin fails to verify user permissions before performing sensitive actions. Patchstack published the advisory describing the issue as a subscriber-level access control weakness.
Critical Impact
Unauthenticated attackers can invoke plugin functionality restricted to authorized users, resulting in unauthorized modifications to LMS data on affected WordPress sites.
Affected Products
- Masteriyo LMS WordPress plugin versions ≤ 3.4.0
- WordPress sites running the Learning Management System plugin by Masteriyo
- Any deployment allowing subscriber-level or unauthenticated access to plugin endpoints
Discovery Timeline
- 2026-09-11 - CVE-2026-62132 published to the National Vulnerability Database (NVD)
- 2026-09-11 - Last updated in NVD database
Technical Details for CVE-2026-62132
Vulnerability Analysis
The Masteriyo LMS plugin exposes functionality that should be restricted to privileged roles but lacks proper capability checks. Under [CWE-862] Missing Authorization, the affected endpoints do not validate whether the requesting user holds the required role before executing the action. An attacker with subscriber-level access, or in some cases no authenticated session at all, can reach these endpoints over the network.
The integrity impact is scoped to limited data modification rather than full site compromise. Confidentiality and availability remain unaffected according to the published CVSS vector. The Patchstack advisory categorizes the issue as a broken access control weakness in the plugin's request handlers.
Root Cause
The root cause is missing or insufficient authorization enforcement in one or more request handlers within Masteriyo LMS ≤ 3.4.0. WordPress plugins are expected to gate privileged actions using current_user_can() capability checks and nonce verification. When these checks are absent or misapplied, low-privileged accounts can execute actions reserved for administrators or instructors.
Attack Vector
Exploitation occurs over the network against the WordPress admin-ajax or REST API endpoints exposed by the plugin. An attacker registers or uses an existing subscriber account, then sends crafted HTTP requests to the vulnerable endpoint. The plugin processes the request without verifying the user's role or capabilities, executing the requested action.
For complete technical details, refer to the Patchstack Vulnerability Report.
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Indicators of Compromise
- Unexpected modifications to LMS courses, lessons, quizzes, or enrollment records without corresponding administrator activity
- HTTP POST requests to Masteriyo plugin endpoints originating from subscriber accounts or unauthenticated sessions
- New subscriber account registrations followed by rapid API calls to plugin-specific routes
Detection Strategies
- Review WordPress access logs for requests to /wp-admin/admin-ajax.php and /wp-json/masteriyo/* endpoints from low-privileged users
- Correlate WordPress user role changes and content modifications against expected administrator activity windows
- Enable WordPress audit logging plugins to capture role-based action attempts and unauthorized modifications
Monitoring Recommendations
- Deploy a Web Application Firewall (WAF) with rules targeting Masteriyo LMS endpoint abuse
- Ingest WordPress and web server logs into a centralized SIEM for correlation of authentication and plugin activity
- Alert on anomalous request volumes to LMS plugin endpoints, particularly from newly registered accounts
How to Mitigate CVE-2026-62132
Immediate Actions Required
- Update the Masteriyo LMS plugin to a version later than 3.4.0 as soon as a patched release is available
- Audit existing subscriber accounts and disable open user registration if not required for business operations
- Review recent LMS data changes for unauthorized modifications and restore from backup where necessary
Patch Information
Refer to the Patchstack Vulnerability Report for the latest patched version details and vendor guidance. Apply plugin updates through the WordPress admin dashboard or via wp-cli in maintenance windows.
Workarounds
- Temporarily disable the Masteriyo LMS plugin if patching cannot be performed immediately
- Restrict access to WordPress admin-ajax and REST API endpoints using WAF rules or .htaccess restrictions
- Disable open user registration under WordPress Settings > General > Membership to prevent unauthenticated attackers from obtaining subscriber accounts
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
