Vulnerability · Published Jul 29, 2026 · Assigned by CSA
CVE-2026-63237TOTP two-factor authentication bypass vulnerability
Medium 4.8
In plain English
A medium-severity security flaw in Koollab LMS from Three Learning. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.2%top 92.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A TOTP two-factor authentication bypass vulnerability in Koollab LMS allowed an attacker to supply a client-controlled seed to generate a matching one-time password and bypass the second authentication factor, potentially enabling unauthorised access to administrator accounts.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Three Learning | Koollab LMS | 5.3.2 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N