VULNERABILITY INTELLIGENCE

CVE-2025-66489

CVSS score9.8 CRITICAL
EPSS probability0.96%
CISA KEVNot currently listed
Published2025-12-03
Last modified2026-10-18
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker to bypass password verification when a TOTP code is provided, potentially gaining unauthorized access to user accounts. This issue exists due to problematic conditional logic in the authentication flow. This vulnerability is fixed in 5.9.8.

Weakness classification

  • security-advisories@github.com: CWE-303

Primary references