CVE-2025-66489 — Cal.com Authentication Bypass via bad TOTP + password checks

CVE-2025-66489

Cal.com Authentication Bypass via bad TOTP + password checks PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
calcom / cal.com	affected < 5.9.8

CWE

CWE-303

References

https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.