CVE-2020-26030

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CVSS 3.1

9.8 critical

EPSS

1%p69

Published

Dec 28, 2020 (Dec 28, 2020)

Modified

Jun 17, 2026

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.

Vendors: zammad
Products: zammad
Weakness: CWE-287
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (1.3%)

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