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CVE-2026-16759— Tutor LMS <= 4.0.5 - Unauthenticated Remote Code Execution via 'template' and 'data' POST Parameters

Quick assessment

Affected
themeum Tutor LMS – eLearning and online course solution
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.

Tutor LMS——WordPress 的在线课程管理插件——在包括 4.0.5 及之前的所有版本中，通过 AJAX 操作存在远程代码执行（RCE）漏洞，但仅限于调用无参数的函数。该漏洞源于处理程序缺少权限验证，且未对传入 中 的数组键进行清理，导致攻击者可控的 POST 数据能够覆盖局部变量 。在最终使用的 模板中，变量 和 会被用于调用 。这使得未认证的攻击者可以在服务器端调用任意无参数的 PHP 函数，并通过 WordPress 核心函数 ，利用请求参数创建一个持久化的订阅者级别账户。

CVSS 6.5 · Medium EPSS 0.43% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
themeum Tutor LMS – eLearning and online course solution ≤ 4.0.5 affected
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I. Basic Information for CVE-2026-16759

Vulnerability Information
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Vulnerability Title
Tutor LMS <= 4.0.5 - Unauthenticated Remote Code Execution via 'template' and 'data' POST Parameters
Source: CVE Program / CVE List V5
Vulnerability Description
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Remote Code Execution limited to zero-argument function invocation in all versions up to, and including, 4.0.5 via the tutor_course_filter_ajax AJAX action. This is due to missing authorization on the handler combined with unsanitized array keys being passed to extract() inside tutor_load_template(), allowing attacker-controlled POST data to overwrite the local $template variable and, in the resulting templates/single-content-loader.php template, the $method_map and $context variables invoked at $method_map[$context](). This makes it possible for unauthenticated attackers to call an arbitrary zero-argument PHP function server-side and, via WordPress core edit_user(), to create a persistent subscriber-level account from request parameters.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
themeum Tutor LMS – eLearning and online course solution 0 ~ 4.0.5 -

II. Public POCs for CVE-2026-16759

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III. Intelligence Information for CVE-2026-16759

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Patches & Fixes for CVE-2026-16759 (3)

News Coverage for CVE-2026-16759 (1)

Other References for CVE-2026-16759 (2)

IV. Related Vulnerabilities

Same product: Tutor LMS – eLearning and online course solution
Same vendor: themeum
Same weakness: CWE-74

V. Comments for CVE-2026-16759

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