{"id":"CVE-2020-12619","aliases":["EUVD-2020-4920","GHSA-fvwq-3pcx-4fvr"],"status":"published","title":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced...","description":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00429,"percentile":0.37572,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2020-08-20T22:44:46Z","modified":"2026-06-17T02:52:01Z","products":[{"vendor":"freron","product":"mailmate"}],"references":[{"url":"https://updates.mailmate-app.com/2.0/release_notes","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12619"},{"url":"https://github.com/advisories/GHSA-fvwq-3pcx-4fvr"}],"sources":{"cve":[{"id":"CVE-2020-12619","description":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.","status":"published","published":"2020-08-20T22:44:46Z","modified":"2024-08-04T12:04:22.532Z","updated_at":"2026-11-02T14:35:52.925152Z"}],"euvd":[{"id":"EUVD-2020-4920","description":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.","status":"published","published":"2020-08-20T22:44:46Z","modified":"2024-08-04T12:04:22Z","updated_at":"2026-11-03T03:07:39.896975Z"}],"ghsa":[{"id":"GHSA-fvwq-3pcx-4fvr","title":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced...","description":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.","status":"published","published":"2022-05-24T17:26:17Z","modified":"2023-01-29T05:04:13Z","cwes":["CWE-295"],"updated_at":"2026-11-02T14:45:29.899073Z"}],"nvd":[{"id":"CVE-2020-12619","description":"MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.","status":"published","published":"2020-08-20T23:15:10.837Z","modified":"2026-06-17T02:52:01.783Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:13.05572Z"}]}}