CVE-2026-63233

CriticalCVSS 9.9/10Last modified Oct 23, 2026

Description

A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to inject through the assessment overall answer endpoint, control data passed to unserialize(), write a webshell to a publicly accessible location, and execute arbitrary code on the server.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-89

Affected software

No affected versions have been published.

Timeline

Published
Jul 29, 2026
Last modified
Oct 23, 2026
NVD status
Deferred

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CVE-2026-63233: Critical severity, CVSS 9.9 | Vulnix