CVE-2021-31703: Frontiersoftware Ichris

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

Frontier ichris through 5.18 allows users to upload malicious executable files that might later be downloaded and run by any client user.

Affected products

• Frontiersoftware Ichris: up to and including 5.18

Published 2021-05-29. Last modified 2026-06-17.