Cal.com Authentication Bypass via bad TOTP + password checks_CVE-2025-66489

{
    "lastseen": "",
    "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.",
    "published": "2025-12-03T19:44:35.303Z",
    "modified": "2025-12-03T21:48:27.861Z",
    "type": "cve",
    "title": "Cal.com Authentication Bypass via bad TOTP + password checks",
    "source": "GitHub_M",
    "references": "https://github.com/calcom/cal.com/security/advisories/GHSA-9r3w-4j8q-pw98",
    "id": "CVE-2025-66489",
    "bulletinFamily": "",
    "cwe": [
        "CWE-303"
    ],
    "cvelist": null,
    "sourceData": "calcom cal.com < 5.9.8",
    "sourceHref": "",
    "cvss": {
        "score": 9.9,
        "severity": "CRITICAL",
        "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "cal.com",
    "version": "< 5.9.8",
    "vendor": "calcom",
    "ai_description": "Authentication bypass vulnerability in Cal.com due to flawed TOTP and password checks",
    "ai_severity": "Critical",
    "ai_vendor": "Calcom",
    "ai_product": "Cal.com",
    "ai_version": "< 5.9.8",
    "ai_score": 9.9
}