{"id":"CVE-2020-8156","aliases":["EUVD-2020-29049","GHSA-fgvj-4m6x-j67f"],"status":"published","title":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","description":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00956,"percentile":0.61668,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2020-05-12T13:01:22Z","modified":"2026-10-24T10:30:42Z","products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"nextcloud","product":"mail"}],"references":[{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-020","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8156"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP"},{"url":"https://github.com/advisories/GHSA-fgvj-4m6x-j67f"}],"sources":{"cve":[{"id":"CVE-2020-8156","description":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","status":"published","published":"2020-05-12T13:01:22Z","modified":"2024-08-04T09:48:25.674Z","cwes":["CWE-295"],"updated_at":"2026-11-02T14:35:50.545879Z"}],"euvd":[{"id":"EUVD-2020-29049","description":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","status":"published","published":"2020-05-12T13:01:22Z","modified":"2024-08-04T09:48:25Z","updated_at":"2026-11-03T03:07:58.055641Z"}],"ghsa":[{"id":"GHSA-fgvj-4m6x-j67f","title":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","description":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","status":"published","published":"2022-05-24T17:17:44Z","modified":"2024-11-20T15:30:48Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:58:53.680904Z"}],"nvd":[{"id":"CVE-2020-8156","description":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","status":"published","published":"2020-05-12T13:15:13.187Z","modified":"2026-06-17T03:25:57.45Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:06:00.784809Z"}],"osv":[{"id":"CVE-2020-8156","description":"A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.","status":"published","published":"2020-05-12T13:15:13.187Z","modified":"2026-10-24T10:30:42.793339852Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:44:17.663289Z"}]}}