Medium (6.5). EPSS 0.4% chance of exploitation in the next 30 days.
A vulnerability in multi-tenant hosting allows an authenticated sender to spoof the identity of a shared, hosted domain, thus bypass security measures provided by DMARC (or SPF or DKIM) policies.
Severity
CVSS 3.1
6.5 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-31)