CVE-2025-66489
criticalpriority · track · 39EPSS 0.010 · 61 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (5)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2025-66489cnnvd
- https://github.com/calcom/cal.com/releasesPatchcnnvd
- https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98cnnvd
- https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98enisa_euvd
- https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98ExploitThird Party Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan