CVE-2026-3007 PUBLISHED

Stored Cross-Site Scripting (XSS) Vulnerability

Assigner: CSA
Reserved: 23.02.2026 Published: 23.04.2026 Updated: 23.04.2026

Successful exploitation of the stored cross-site scripting (XSS) vulnerability could allow an attacker to execute arbitrary JavaScript on any user account that has access to Koollab LMS’ courselet feature.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS Score: 5.4

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Three Learning
Product	Koollab Learning Management System
Versions	Default: unaffected Version 5.3.2. is affected

Solutions

Users and administrators of the affected product version are advised to update to the latest version 5.4.0 immediately.

Credits

Justin Ng finder

References

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-042/