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CVE-2026-13764— Masterstudy - Education WordPress Theme <= 4.8.151 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation

Quick assessment

Affected
StylemixThemes Masterstudy - Education WordPress Theme
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 主题"Masterstudy - Education WordPress Theme"在所有 4.8.151 及更早版本中存在权限提升漏洞。该漏洞源于 AJAX 操作缺少必要的授权验证和 nonce（一次性令牌）校验。这使得拥有订阅者（Subscriber）及以上权限的已认证攻击者能够通过设置 临时变量（transient），并利用开发者访问自动登录流程，获取管理员会话 Cookie，从而将自身权限提升至管理员级别。

CVSS 8.8 · High
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I. Basic Information for CVE-2026-13764

Vulnerability Information
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Vulnerability Title
Masterstudy - Education WordPress Theme <= 4.8.151 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
StylemixThemes Masterstudy - Education WordPress Theme 0 ~ 4.8.151 -

II. Public POCs for CVE-2026-13764

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III. Intelligence Information for CVE-2026-13764

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Other References for CVE-2026-13764 (3)

IV. Related Vulnerabilities

Same vendor: StylemixThemes
Same weakness: CWE-862