by Kastro
Paper/Archive/CVE-2026-63233

CVE-2026-63233

Three Learning Koollab LMS — SQL injection and unsafe deserialisation vulnerability

EPSS 0.5%CVSS 9.9
critical.is priorityof 100
39
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 44.8.448 × 209.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Koollab LMS5.3.2–CNA

Scores by source

CSA (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refcsa.gov.sg/alerts-and-advisories/alerts/al-2026-094