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CVE-2026-4484 is a privilege escalation vulnerability in the Masteriyo LMS plugin for WordPress affecting all versions up to and including 2.1.6. The flaw is caused by improper authorization in the plugin's handling of instructor-related object updates: the InstructorsController::prepare_object_for_database function allows a user role to be updated without enforcing appropriate privilege checks. As a result, an authenticated user can manipulate role-related data during the request flow and assign elevated privileges. According to the provided information, attackers with Student-level access or higher can exploit this issue to escalate their account to administrator.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
Repository contains a single Python exploit script (CVE-2026-4484.py), a README, and a custom license. The Python script is an operational PoC for CVE-2026-4484 affecting the Masteriyo LMS WordPress plugin up to version 2.1.6. It is not part of a major exploit framework. The exploit automates authenticated privilege escalation by logging in as a low-privileged user, extracting the current user ID and WordPress nonce from the account dashboard, and sending a crafted POST request to /wp-json/masteriyo/v1/users/instructors/{user_id} with a JSON body assigning the administrator role. The script supports two modes: Nx_1 registers a new account through /account/signup/ and /st/ before logging in; Nx_2 uses existing credentials. Both modes then authenticate through /wp-admin/admin-ajax.php, retrieve dashboard context from /account/#/dashboard, perform the role escalation, re-authenticate with a fresh session, and verify administrative access. Successful compromises are written to Login_admin.txt. The code includes session handling, randomized user agents, nonce extraction logic, multithreaded processing of multiple targets from a user-supplied list, and cookie-based checks for WordPress authenticated sessions. Overall purpose: bulk exploitation of vulnerable WordPress sites running Masteriyo LMS, resulting in administrator takeover when registration is open or valid low-privileged credentials are available.
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