{"id":"CVE-2019-5456","aliases":["EUVD-2019-15040","GHSA-8hq9-mg8q-pw66"],"status":"published","title":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi...","description":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version \u003c= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01295,"percentile":0.70526,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-255","CWE-300"],"published":"2019-07-30T20:19:48Z","modified":"2026-06-17T02:37:43Z","products":[{"vendor":"ui","product":"unifi_controller"},{"vendor":"unifi","product":"unifi"}],"references":[{"url":"https://hackerone.com/reports/519582","tags":["x_refsource_MISC","x_transferred","Permissions Required"]},{"url":"https://community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://community.ui.com/releases/862b962b-55f6-4324-96be-610f647d5c1c","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://community.ui.com/releases/9f698d0b-8279-40d3-9f1a-d36db4813124","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-5456"},{"url":"https://github.com/advisories/GHSA-8hq9-mg8q-pw66"}],"sources":{"cve":[{"id":"CVE-2019-5456","description":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version \u003c= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.","status":"published","published":"2019-07-30T20:19:48Z","modified":"2024-08-04T19:54:53.544Z","cwes":["CWE-300"],"updated_at":"2026-11-02T14:20:18.746972Z"}],"euvd":[{"id":"EUVD-2019-15040","description":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version \u003c= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.","status":"published","published":"2019-07-30T20:19:48Z","modified":"2024-08-04T19:54:53Z","updated_at":"2026-11-03T03:06:51.888651Z"}],"ghsa":[{"id":"GHSA-8hq9-mg8q-pw66","title":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi...","description":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version \u003c= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.","status":"published","published":"2022-05-24T16:51:48Z","modified":"2023-01-31T05:02:58Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:48:22.700087Z"}],"nvd":[{"id":"CVE-2019-5456","description":"SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version \u003c= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.","status":"published","published":"2019-07-30T21:15:12.037Z","modified":"2026-06-17T02:37:43.277Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-300","CWE-255"],"updated_at":"2026-11-02T14:05:21.892729Z"}]}}