This vulnerability (CVE-2026-57330) is a CWE-79 type cross-site scripting issue in Stylemix MasterStudy LMS, affecting versions up to 3.7.27. It allows subscriber-level users to inject malicious scripts due to improper input neutralization during web page generation. The CVSS 3.1 base score is 6.5, indicating a medium severity with network attack vector, low attack complexity, requiring privileges and user interaction, and impacts confidentiality, integrity, and availability to a limited extent. No patch or official remediation level has been disclosed as of the publication date.

Successful exploitation could allow an attacker with subscriber privileges to execute arbitrary scripts in the context of other users, potentially leading to limited confidentiality, integrity, and availability impacts within the affected LMS environment. The vulnerability requires user interaction and privileges, limiting the scope of exploitation.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting subscriber input capabilities and monitoring for suspicious activity related to script injection. Avoid granting unnecessary privileges to subscriber accounts.