CVE-2026-63228 Details
Description
An unrestricted image upload vulnerability in Koollab LMS allowed an authenticated attacker to upload malicious content disguised as an image file via the feedback mail registration endpoint, potentially enabling further attacks on the server.
A vulnerability allowing unrestricted image uploads has been identified in Koollab Learning Management System (LMS) version 5.3.2. This vulnerability enables authenticated attackers to upload malicious content disguised as image files through the feedback mail registration endpoint. Such uploads could potentially lead to further attacks on the server.
Three Learning, the product owner, has patched this vulnerability across all cloud-hosted instances of Koollab LMS. No manual action is required from users or administrators.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 29, 2026CISA-ADP
Assessed Jul 29, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/ | CSA | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-434 | Unrestricted Upload of File with Dangerous Type | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Koollab LMS | 5.3.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 29, 2026 | CVE Modified | CISA-ADP |
| Jul 29, 2026 | New CVE Received | CSA |