CVE-2019-20790
CVSS v3
9.8
CRITICAL
EPSS Score
2.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2020-04-27
Frequently asked questions
What is CVE-2019-20790?
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.
Is CVE-2019-20790 actively exploited?
Active exploitation of CVE-2019-20790 has not been confirmed. Its EPSS score was 2.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-20790?
CVE-2019-20790 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2019-20790 affecting your environment?
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