CVE-2026-63238
Authentication bypass vulnerability
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
An authentication bypass vulnerability in Koollab LMS allowed an unauthenticated attacker to take over any account, including administrator accounts, by supplying a valid user UUID without providing primary credentials via the 2FA validation endpoint.
| Vendor | three learning |
| Product | koollab lms |
| Published | Jul 29, 2026 |
Stay Ahead of the Next One
Get instant alerts for three learning koollab lms
Be the first to know when new medium vulnerabilities affecting three learning koollab lms are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
Three Learning / Koollab LMS
5.3.2