CVE-2026-3007

MEDIUM 5.4

Stored Cross-Site Scripting (XSS) Vulnerability

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	three learning
Product	koollab learning management system
Published	Apr 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Three Learning / Koollab Learning Management System

5.3.2.

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Justin Ng