Spoofing

2022-03-1600:15:00

PRIOn knowledge base

www.prio-n.com

5 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

24.8%

JSON

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.)

CPENameOperatorVersion
email_securityeq< 2020110

CPE	Name	Operator	Version
	email_security	eq	< 2020110

References

wesleyk.me/2020/01/10/my-first-vulnerability-mimecast-sender-address-verification/