CVE-2026-63234 — CRITICAL (9.9)

Vulnerability Description

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

CVSS Score

9.9

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-89

References

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/

FAQ

What is CVE-2026-63234?

CVE-2026-63234 is a vulnerability with a CVSS score of 9.9 (CRITICAL). A SQL injection and unsafe deserialisation vulnerability in Koollab LMS allowed an authenticated attacker to inject through the manual mark assessment endpoint, control data passed to unserialize(), w...

How severe is CVE-2026-63234?

CVE-2026-63234 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-63234?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.