Is CVE-2026-63239 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-63239 being exploited in the wild.

How severe is CVE-2026-63239?

Medium severity, with a CVSS score of 5.4, published 29 July 2026.

Which products and versions are affected?

Three Learning Koollab LMS 5.3.2.

Is there a fix for CVE-2026-63239?

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-2026-63239 attacked?

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

Am I affected by CVE-2026-63239?

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-2026-63239: Three Learning Koollab LMS hard-coded AWS IAM credentials

CVE-2026-63239 · Severity: medium · CVSS 5.4 · Published 2026-07-29

Koollab LMS is a cloud-based platform used for corporate training and e-learning. A security flaw involving hard-coded Amazon Web Services (AWS) credentials allowed unauthorized access to the platform's shared storage and messaging systems. This could have resulted in the exposure of sensitive student data, the injection of malicious content into courses, or the interception of system emails.

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

Quick answers

Is CVE-2026-63239 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-63239 being exploited in the wild.
How severe is CVE-2026-63239?: Medium severity, with a CVSS score of 5.4, published 29 July 2026.
Which products and versions are affected?: Three Learning Koollab LMS 5.3.2.
Is there a fix for CVE-2026-63239?: 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-2026-63239 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-63239?: 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

The vulnerability stems from the inclusion of hard-coded AWS IAM credentials within the Koollab LMS application. An attacker with network access could extract these credentials to gain unauthorized access to the provider's multi-tenant AWS infrastructure, specifically S3 buckets and SQS queues. This access allows for the exfiltration of sensitive data, modification of stored content (content injection), and manipulation of background jobs or email communications. The vendor, Three Learning, has patched this vulnerability across its SaaS infrastructure; since it is a cloud-hosted service, 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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