Name: CVE-2019-20790: Authentication Bypass by Spoofing
Creator: Rapid7
Published: 2020-04-27T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2019-20790, CWE-290, CVSS 9.8, EPSS 0.0264

OpenDMARC through 1.3.2 and 1.4.x, when used with pypolicyd-spf 2.0.2, allows attacks that bypass SPF and DMARC authentication in situations where the HELO field is inconsistent with the MAIL FROM field.

CVSS Details

CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Arch Linux	—	Upgrade to the latest version of Arch Linux	Jul 11, 2025	Apr 27, 2020
Debian	—	Upgrade opendmarc	Jul 30, 2024	Apr 27, 2020
Freebsd	—	Upgrade opendmarc	Nov 4, 2022	Dec 30, 2021

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CVSS Details

Covered by Rapid7

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