Information Disclosure in Koollab LMS Affects Learner Integrity
CVE-2026-63240

4.3MEDIUM

Key Information:

Vendor

Three Learning

Status
Koollab Lms
Vendor
CVE Published:
29 July 2026

What is CVE-2026-63240?

An information disclosure vulnerability in Koollab LMS enables authenticated learners to access correct quiz answers via the course status endpoint, which undermines the integrity of assessments and gives students an unfair advantage by circumventing legitimate assessment processes.

Affected Version(s)

Koollab LMS 5.3.2

References

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-20...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.