What is CVE-2026-63239?

CVE-2026-63239 is a medium-severity vulnerability in Three Learning Koollab Lms, classified under Use of Hard-coded Credentials. CVSS score: 5.4/10. Published 2026-07-29.

How severe is CVE-2026-63239?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Three Learning Koollab Lms

CVE-2026-63239

A hard-coded AWS IAM credentials vulnerability in Koollab LMS allowed an attacker to access shared multi-tenant S3 buckets and SQS queues, exposing sensitive data and enabling malicious content injection, job manipulation, or email interce…

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Three Learning Koollab Lms — versions 5.3.2

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

5f57b9bf-260d-4433-bf07-b6a79e9bb7d4

Frequently asked questions

What is CVE-2026-63239?: CVE-2026-63239 is a medium-severity vulnerability in Three Learning Koollab Lms, classified under Use of Hard-coded Credentials. CVSS score: 5.4/10. Published 2026-07-29.
How severe is CVE-2026-63239?: Medium severity. CVSS v3 base score is 5.4 out of 10.