CVE-2026-89333: CWE-639 Authorization Bypass Through User-Controlled Key in themeum Tutor LMS – eLearning and online course solution
Tutor LMS – eLearning and online course solution plugin for WordPress versions up to 4.0.8 is vulnerable to an insecure direct object reference via the 'student_id' parameter. This vulnerability allows authenticated users with subscriber-level access or higher to disclose email addresses and phone numbers of arbitrary WordPress users, including administrators, by iterating over user IDs. The issue arises from missing validation on a user-controlled key.
AI Analysis
Technical Summary
CVE-2026-89333 describes an authorization bypass vulnerability (CWE-639) in the Tutor LMS WordPress plugin up to version 4.0.8. The flaw is due to insufficient validation of the 'student_id' parameter, which is user-controlled. Authenticated attackers with subscriber-level privileges can exploit this to enumerate user IDs and retrieve sensitive information such as email addresses and phone numbers of any WordPress user, including administrators.
Potential Impact
The vulnerability allows disclosure of sensitive personal information (email addresses and phone numbers) of arbitrary users, including administrators, without proper authorization. This can lead to privacy violations and potentially facilitate further targeted attacks against exposed users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level access where possible and monitor for suspicious activity related to user enumeration attempts.
CVE-2026-89333: CWE-639 Authorization Bypass Through User-Controlled Key in themeum Tutor LMS – eLearning and online course solution
Description
Tutor LMS – eLearning and online course solution plugin for WordPress versions up to 4.0.8 is vulnerable to an insecure direct object reference via the 'student_id' parameter. This vulnerability allows authenticated users with subscriber-level access or higher to disclose email addresses and phone numbers of arbitrary WordPress users, including administrators, by iterating over user IDs. The issue arises from missing validation on a user-controlled key.
CVSS v3.1
Score 6.5medium
Affected software
themeum
Tutor LMS – eLearning and online course solution
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-89333 describes an authorization bypass vulnerability (CWE-639) in the Tutor LMS WordPress plugin up to version 4.0.8. The flaw is due to insufficient validation of the 'student_id' parameter, which is user-controlled. Authenticated attackers with subscriber-level privileges can exploit this to enumerate user IDs and retrieve sensitive information such as email addresses and phone numbers of any WordPress user, including administrators.
Potential Impact
The vulnerability allows disclosure of sensitive personal information (email addresses and phone numbers) of arbitrary users, including administrators, without proper authorization. This can lead to privacy violations and potentially facilitate further targeted attacks against exposed users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level access where possible and monitor for suspicious activity related to user enumeration attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-09-11T15:58:26.677Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aadf7a955bf5e2cf501d549
Added to database: 09/19/2026, 02:47:05 UTC
Last enriched: 09/19/2026, 03:01:56 UTC
Last updated: 09/19/2026, 03:28:02 UTC
Views: 5
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