{"id":"CVE-2018-3761","details":"Nextcloud Server before 12.0.8 and 13.0.3 suffer from improper authentication on the OAuth2 token endpoint. Missing checks potentially allowed handing out new tokens in case the OAuth2 client was partly compromised.","modified":"2026-04-10T04:09:25.818638Z","published":"2018-07-05T16:29:00.407Z","references":[{"type":"ADVISORY","url":"https://hackerone.com/reports/343111"},{"type":"ADVISORY","url":"https://nextcloud.com/security/advisory/?id=nc-sa-2018-003"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nextcloud/server","events":[{"introduced":"0"},{"fixed":"42d3169e276bda2e2c41849fcc8a6f683719b323"},{"introduced":"3b4285e13f6b1ec074b98466f49e189101f090bc"},{"fixed":"8a0093d9cada749aa0182b1c2248b42e0ea47f0b"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"12.0.8"},{"introduced":"13.0.0"},{"fixed":"13.0.3"}]}}],"versions":["theming-1.4.5","v1.0.0beta1","v11.0.0","v11.0RC2","v12.0.0","v12.0.0RC1","v12.0.0RC2","v12.0.0RC3","v12.0.0beta1","v12.0.0beta2","v12.0.0beta3","v12.0.0beta4","v12.0.1","v12.0.1RC1","v12.0.1RC2","v12.0.1RC3","v12.0.1RC4","v12.0.1RC5","v12.0.3","v12.0.3RC1","v12.0.3RC2","v12.0.4","v12.0.4RC1","v12.0.4RC2","v12.0.4RC3","v12.0.5","v12.0.5RC1","v12.0.5RC2","v12.0.5RC3","v12.0.6","v12.0.6RC1","v12.0.7","v12.0.7RC1","v12.0.8RC1","v13.0.0","v13.0.1","v13.0.1RC1","v13.0.2","v13.0.2RC1","v13.0.3RC1","v13.0.3RC2","v3.0","v4.0.0","v4.0.0RC","v4.0.0RC2","v4.0.0beta","v4.0.1","v4.0.4","v4.0.5","v4.0.6","v4.5.0","v4.5.0RC1","v4.5.0RC2","v4.5.0RC3","v4.5.0beta3","v4.5.0beta4","v5.0.0","v5.0.0RC1","v5.0.0RC2","v5.0.0RC3","v5.0.0alpha1","v5.0.0beta1","v5.0.0beta2","v6.0.0RC1","v6.0.0RC2","v6.0.0alpha2","v6.0.0beta2","v6.0.0beta3","v6.0.0beta4","v6.0.0beta5","v7.0.0alpha2","v7.0.0beta1","v8.0.0","v8.0.0RC1","v8.0.0RC2","v8.0.0alpha1","v8.0.0alpha2","v8.0.0beta1","v8.0.0beta2","v8.1.0alpha1","v8.1.0alpha2","v8.1.0beta1","v8.1.0beta2","v8.1RC2","v8.2RC1","v8.2beta1","v9.0.0beta2","v9.0beta1","v9.1.0beta1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-3761.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"}]}