TOTP two-factor authentication bypass vulnerability
Priority LOW 21CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-347.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00176 7th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Three Learning | Koollab LMS | 5.3.2 | — | No fix listed | CNA |
- Koollab LMS VendorThree Learning Affected 5.3.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-63237
- 2026-10-03 Alias added: GHSA-8j44-5653-q846
References
More Three Learning vulnerabilities
- TI-2026-45107 Pre-authentication error-based SQL injection vulnerability CVSS 3.1CRITICAL 9.1
- TI-2026-45106 Pre-authentication blind SQL injection vulnerability CVSS 3.1CRITICAL 9.1
- TI-2026-45111 SQL injection and unsafe deserialisation vulnerability CVSS 3.1CRITICAL 9.9
- TI-2026-45110 SQL injection and unsafe deserialisation vulnerability CVSS 3.1CRITICAL 9.9
- TI-2026-45109 SQL injection and unsafe deserialisation vulnerability CVSS 3.1CRITICAL 9.9
- TI-2026-45108 Post-authentication SQL injection vulnerability CVSS 3.1HIGH 8.1
Sources
- CVE-2026-63237 · CVE Program
- CVE-2026-63237 · NVD
- FIRST EPSS
- GHSA-8j44-5653-q846 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences