{"id":"CVE-2025-66489","state":"PUBLISHED","title":"Cal.com Authentication Bypass via bad TOTP + password checks","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.","publishedAt":"2025-12-03T19:44:35.303Z","updatedAt":"2025-12-03T21:48:27.861Z","severity":{"score":9.9,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["calcom cal.com"],"affected":[{"vendor":"calcom","product":"cal.com","versions":[{"version":"< 5.9.8","status":"affected"}]}],"references":["https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98"],"weaknesses":["CWE-303"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/66xxx/CVE-2025-66489.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66489","state":"PUBLISHED","datePublished":"2025-12-03T19:44:35.303Z","dateUpdated":"2025-12-03T21:48:27.861Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-12-02T22:44:04.707Z"},"containers":{"cna":{"title":"Cal.com Authentication Bypass via bad TOTP + password checks","descriptions":[{"lang":"en","value":"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":[{"vendor":"calcom","product":"cal.com","versions":[{"version":"< 5.9.8","status":"affected"}]}],"references":[{"url":"https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98","name":"https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","baseScore":9.9,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-303","lang":"en","description":"CWE-303: Incorrect Implementation of Authentication Algorithm","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-12-03T19:44:35.303Z"},"source":{"advisory":"GHSA-9r3w-4j8q-pw98","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-03T21:48:18.299562Z","id":"CVE-2025-66489","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-03T21:48:27.861Z"}}]}}}