CVE-2026-13764 · Package
NO FIX YET · SEE WHAT TO DO
The Masterstudy Education WordPress theme, through version 4.8.151, lacks authorization and nonce checks on an AJAX action. A logged-in subscriber can set a developer access token and use an auto-login flow to obtain an administrator session.
first public Nov 12, 2026 · 1 source
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Sites running the Masterstudy Education WordPress theme at version 4.8.151 or older where users can register or hold a subscriber account. Sites without this theme, or where only trusted administrators have accounts, are not exposed by this flaw. The sources do not say whether the developer access feature must be enabled.
Not affected if no-public-registration, theme-not-installed
Who cares masterstudy-theme, self-hosted, wordpress
masterstudy_ms_stm_set_discard_transient action in the theme's PHP files.4.8.151; the fixed version is unknown from the sources.The Masterstudy - Education WordPress Theme theme for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.8.151. This is due to missing authorization and nonce validation on the masterstudy_ms_stm_set_discard_transient AJAX action. This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to Administrator by setting the stm_developer_access_token transient and using the developer access auto-login flow to obtain administrator session cookies.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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