CVE-2021-42357: Apache Knox

Medium severity, CVSS 6.1. EPSS: 2.6% chance of exploitation in the next 30 days.

When using Apache Knox SSO prior to 1.6.1, a request could be crafted to redirect a user to a malicious page due to improper URL parsing. A request that included a specially crafted request parameter could be used to redirect the user to a page controlled by an attacker. This URL would need to be presented to the user outside the normal request flow through a XSS or phishing campaign.

Affected products

• Apache Knox: before 1.6.1 (fixed in 1.6.1)

Published 2022-01-17. Last modified 2026-06-17.