What’s Vulnerable › Vulnerabilities

CVE-2026-63237: TOTP two-factor authentication bypass vulnerability

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-29 · updated 2026-10-23
• Weakness: CWE-347

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

• Three Learning Koollab LMS: 5.3.2

References

• https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/

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