CVE-2021-42650: Portainer

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Cross Site Scripting (XSS vulnerability exists in Portainer before 2.9.1 via the node input box in Custom Templates.

Affected products

• Portainer Portainer: before 2.9.1 (fixed in 2.9.1)

Published 2021-10-18. Last modified 2026-06-17.