Is CVE-2026-63240 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-63240 being exploited in the wild.

How severe is CVE-2026-63240?

Medium severity, with a CVSS score of 4.3, published 29 July 2026.

Which products and versions are affected?

Three Learning Koollab LMS 5.3.2.

Is there a fix for CVE-2026-63240?

A patch was published on 2026-04-26: Vendor patched cloud instances Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-63240 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-63240?

Check whether you run Three Learning Koollab LMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-63240: Three Learning Koollab LMS information disclosure in course status endpoint

CVE-2026-63240 · Severity: medium · CVSS 4.3 · Published 2026-07-29

Koollab LMS is a cloud-based platform used for corporate training and educational assessments. A security flaw allowed students to view the correct answers to quiz questions through a specific system endpoint without actually completing the test. This undermines the integrity of the training program and allows users to bypass legitimate assessment requirements.

Technologies: Three Learning Koollab LMS. Vendors: Three Learning.

Quick answers

Is CVE-2026-63240 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-63240 being exploited in the wild.
How severe is CVE-2026-63240?: Medium severity, with a CVSS score of 4.3, published 29 July 2026.
Which products and versions are affected?: Three Learning Koollab LMS 5.3.2.
Is there a fix for CVE-2026-63240?: A patch was published on 2026-04-26: Vendor patched cloud instances Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-63240 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-63240?: Check whether you run Three Learning Koollab LMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An information disclosure vulnerability exists in the course status endpoint of Koollab LMS version 5.3.2. The root cause is improper access control or data filtering on the course status API, which returns sensitive quiz metadata to the client. An authenticated attacker with 'learner' privileges can query this endpoint to retrieve correct answers for assessments they have not yet completed. This allows for the bypass of assessment integrity controls. The vendor, Three Learning, has patched this vulnerability across all cloud-hosted SaaS instances; no user action is required.

Affected products

Three Learning Koollab LMS 5.3.2

Timeline

2026-04-14: disclosed: Vendor disclosure
2026-04-26: patched: Vendor patched cloud instances
2026-07-29: advisory: Public release of advisory

References

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

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