Cal.Com vulnerabilities
4 vulnerabilities
Known vulnerabilities in Cal.Com, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2025-66489calcal.com+1
EPSS score0.84%
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.CVE-2026-23478calcal.com+1EPSS score0.47%
Cal.com is open-source scheduling software. From 3.1.6 to before 6.0.7, there is a vulnerability in a custom NextAuth JWT callback that allows attackers to gain full authenticated access to any user's account by supplying a target email address via session.update(). This vulnerability is fixed in 6.0.7.CVE-2023-1647calcal.com+1EPSS score0.84%
Improper Access Control in GitHub repository calcom/cal.com prior to 2.7.CVE-2023-37919calcal.com+1EPSS score0.31%
Cal.com is open-source scheduling software. A vulnerability allows active sessions associated with an account to remain active even after enabling 2FA. When activating 2FA on a Cal.com account that is logged in on two or more devices, the account stays logged in on the other device(s) stays logged in without having to verify the account owner's identity. As of time of publication, no known patches or workarounds exist.