VULNERABILITY INTELLIGENCE

CVE-2020-26030

CVSS score9.8 CRITICAL

EPSS probability1.35%

CISA KEVNot currently listed

Published2020-12-28

Last modified2026-06-17

Description

An issue was discovered in Zammad before 3.4.1. There is an authentication bypass in the SSO endpoint via a crafted header, when SSO is not configured. An attacker can create a valid and authenticated session that can be used to perform any actions in the name of other users.