CVE-2018-15588: Freron Mailmate

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

MailMate before 1.11.3 mishandles a suspicious HTML/MIME structure in a signed/encrypted email.

Affected products

• Freron Mailmate: before 1.11.3 (fixed in 1.11.3)

Published 2019-02-11. Last modified 2026-06-17.