CVE-2020-26030

EUVD-2020-18660
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 65%
Affected Products (NVD)
VendorProductVersion
zammadzammad
1.0.0 ≤
𝑥
< 3.4.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://zammad.com/news/security-advisory-zaa-2020-18
https://zammad.com/news/security-advisory-zaa-2020-18