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CVE-2026-89333— Tutor LMS <= 4.0.8 - Insecure Direct Object Reference to Authenticated (Subscriber+) Sensitive Information Exposure via 'student_id' Parameter

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.

WordPress 插件 Tutor LMS（eLearning 和在线课程解决方案）在所有版本中（包括 4.0.8 及更早版本）均存在不安全直接对象引用（IDOR）漏洞。该漏洞源于对由用户控制的键 参数缺乏有效验证。 此漏洞允许拥有订阅者级别或更高权限的已认证攻击者，通过遍历 参数遍历用户 ID，从而泄露任意 WordPress 用户（包括管理员）的电子邮件地址及 Tutor 个人资料中的手机号码。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1571.002
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I. Basic Information for CVE-2026-89333

Vulnerability Information
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Vulnerability Title
Tutor LMS <= 4.0.8 - Insecure Direct Object Reference to Authenticated (Subscriber+) Sensitive Information Exposure via 'student_id' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.0.8 via the 'student_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to disclose the email address and Tutor profile phone number of arbitrary WordPress users, including Administrators, by iterating over user IDs via the student_id parameter.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
themeum Tutor LMS – eLearning and online course solution 0 ~ 4.0.8 -

II. Public POCs for CVE-2026-89333

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III. Intelligence Information for CVE-2026-89333

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Other References for CVE-2026-89333 (7)

Same Patch Batch · themeum · 2026-09-19 · 3 CVEs total

CVE-2026-89081 6.1 MEDIUM Tutor LMS <= 4.0.8 - Reflected Cross-Site Scripting via 'back_url' and 'search' Parameters
CVE-2026-88944 4.3 MEDIUM Tutor LMS <= 4.0.8 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post D

IV. Related Vulnerabilities

Same product: Tutor LMS – eLearning and online course solution
Same vendor: themeum
Same weakness: CWE-639

V. Comments for CVE-2026-89333

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