CVE-2026-3007 is a stored XSS vulnerability in Three Learning's Koollab LMS version 5.3.2. An attacker can inject malicious JavaScript that executes when users access the courselet feature, potentially compromising user session data or performing actions on behalf of the user. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring low privileges and user interaction, with a scope change and limited confidentiality and integrity impacts but no availability impact. No patch or official remediation level has been published yet.

Successful exploitation could allow attackers to execute arbitrary JavaScript in the context of affected user accounts, potentially leading to partial disclosure or modification of information accessible to those users. There is no impact on system availability. The vulnerability affects confidentiality and integrity to a limited extent. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when interacting with content in the courselet feature, and administrators should monitor for suspicious activity related to this vulnerability.