# CVE-2026-63241: Three Learning Koollab LMS IDOR in course completion query

Source: https://junglewise.ai/threats/cve-2026-63241-three-learning-koollab-lms-idor-in-course-completion-query  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-29. Updated: 2026-07-29  
License: CC BY 4.0 with a link back

CVE-2026-63241 · Severity: low · CVSS 3.1 · Published 2026-07-29

Koollab LMS is a cloud-based learning management system used for corporate training and e-learning. A security flaw allowed logged-in users to view the private course completion progress of any other student on the platform. While this does not allow for account takeover, it results in the unauthorized disclosure of private learning data.

Technologies: [Three Learning Koollab LMS](https://junglewise.ai/threats/technologies/koollab-lms). Vendors: [Three Learning](https://junglewise.ai/threats/vendors/three-learning).

## Quick answers

**Is CVE-2026-63241 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-63241 being exploited in the wild.

**How severe is CVE-2026-63241?** Low severity, with a CVSS score of 3.1, published 29 July 2026.

**Which products and versions are affected?** Three Learning Koollab LMS 5.3.2.

**Is there a fix for CVE-2026-63241?** 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-2026-63241 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-63241?** 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 Insecure Direct Object Reference (IDOR) vulnerability exists in Koollab LMS version 5.3.2. The application fails to perform adequate authorization checks when a user queries course completion progress. An authenticated attacker can exploit this by manipulating object identifiers in network requests to retrieve the private learning progress and status of other users. The vendor 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/](https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/)

## Related threats

- [Three Learning Koollab LMS business logic bypass in SCORM commit endpoint](https://junglewise.ai/threats/cve-2026-63242-three-learning-koollab-lms-business-logic-bypass-in-scorm-commit)
- [Three Learning Koollab LMS information disclosure in course status endpoint](https://junglewise.ai/threats/cve-2026-63240-three-learning-koollab-lms-information-disclosure-in-course)
- [Three Learning Koollab LMS hard-coded AWS IAM credentials](https://junglewise.ai/threats/cve-2026-63239-three-learning-koollab-lms-hard-coded-aws-iam-credentials)
- [Three Learning Koollab LMS authentication bypass in 2FA endpoint](https://junglewise.ai/threats/cve-2026-63238-three-learning-koollab-lms-authentication-bypass-in-2fa-endpoint)
- [Three Learning Koollab LMS TOTP 2FA bypass](https://junglewise.ai/threats/cve-2026-63237-three-learning-koollab-lms-totp-2fa-bypass)