CVE-2026-63237
TOTP two-factor authentication bypass vulnerability
- State
- Published
- Severity
- 4.8 Medium
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Reserved
- Jul 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N | CSA |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
Koollab LMSThree Learning |
|
References
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