{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-11T01:02:03.683","vulnerabilities":[{"cve":{"id":"CVE-2025-66558","sourceIdentifier":"security-advisories@github.com","published":"2025-12-05T18:15:59.140","lastModified":"2025-12-09T16:44:58.910","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Nextcloud Twofactor WebAuthn is the WebAuthn Two-Factor Provider for Nextcloud. Prior to 1.4.2 and 2.4.1, a missing ownership check allowed an attack to take-away a 2FA webauthn device when correctly guessing a 80-128 character long random string of letters, numbers and symbols. The victim would then be prompted to register a new device on the next login. The attacker can not authenticate as the victim. This vulnerability is fixed in 1.4.2 and 2.4.1."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","baseScore":3.1,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-639"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nextcloud:two-factor_webauthn:*:*:*:*:*:*:*:*","versionStartIncluding":"1.0.0","versionEndExcluding":"1.4.2","matchCriteriaId":"C71FF026-3DFA-48DF-BCEE-7A5434D0E0D1"},{"vulnerable":true,"criteria":"cpe:2.3:a:nextcloud:two-factor_webauthn:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.4.1","matchCriteriaId":"35454E68-E1E9-4955-9E67-BA56A57E2BFC"}]}]}],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fr8x-mvjg-wf9q","source":"security-advisories@github.com","tags":["Patch","Vendor Advisory"]},{"url":"https://github.com/nextcloud/twofactor_webauthn/commit/5d2302166d31ee2e01b2e21556bd5372156da13d","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/nextcloud/twofactor_webauthn/pull/881","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://hackerone.com/reports/3360354","source":"security-advisories@github.com","tags":["Permissions Required","Vendor Advisory"]}]}}]}