Insecure User Role Management in MasterStudy LMS WordPress Plugin
CVE-2026-88849
Key Information:
- Vendor
WordPress
- Vendor
- CVE Published:
- 22 October 2026
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What is CVE-2026-88849?
The MasterStudy LMS WordPress Plugin prior to version 3.7.55 suffers from an improper authentication flaw that enables unauthorized users with the Instructor role to bypass user relationship checks during the student-enrolment process. This vulnerability allows them to alter the first name, last name, and public display name of any registered user, including administrators, leading to potential impersonation and phishing attacks. Site administrators should promptly update to the latest version to mitigate this risk.
Affected Version(s)
MasterStudy LMS WordPress Plugin 3.7.13 < 3.7.55
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.