{"id":"CVE-2020-36519","aliases":["EUVD-2020-23996","GHSA-2x44-42qx-w2fx"],"status":"published","title":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC...","description":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)","severity":{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00815,"percentile":0.57491,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-03-15T23:45:01Z","modified":"2026-06-17T03:15:38Z","products":[{"vendor":"mimecast","product":"email_security"}],"references":[{"url":"https://wesleyk.me/2020/01/10/my-first-vulnerability-mimecast-sender-address-verification/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36519"},{"url":"https://github.com/advisories/GHSA-2x44-42qx-w2fx"}],"sources":{"cve":[{"id":"CVE-2020-36519","description":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)","status":"published","published":"2022-03-15T23:45:01Z","modified":"2024-08-04T17:30:08.295Z","updated_at":"2026-11-02T14:35:55.128961Z"}],"euvd":[{"id":"EUVD-2020-23996","description":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)","status":"published","published":"2022-03-15T23:45:01Z","modified":"2024-08-04T17:30:08Z","updated_at":"2026-11-03T03:07:03.010139Z"}],"ghsa":[{"id":"GHSA-2x44-42qx-w2fx","title":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC...","description":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)","status":"published","published":"2022-03-17T00:00:52Z","modified":"2023-01-27T05:00:46Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T14:41:44.80267Z"}],"nvd":[{"id":"CVE-2020-36519","description":"Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)","status":"published","published":"2022-03-16T00:15:07.9Z","modified":"2026-06-17T03:15:38.51Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:46.951463Z"}]}}