CVE-2020-26030 Auth bypass in n/a

Critical 9.8 Published 28 Dec 2020 Updated 4 Aug 2024

Attackers can bypass authentication via crafted headers to impersonate users and perform actions in Zammad helpdesk.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-26030?

CVE-2020-26030 is a critical authentication bypass vulnerability in Zammad Zammad, published on 28 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-287

Which versions are affected by CVE-2020-26030?

It affects 1 product.

Products include Zammad Zammad.

How do I fix CVE-2020-26030?

No fix has been published for CVE-2020-26030 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-26030 being exploited?

There is no known exploitation of CVE-2020-26030 in the wild and no public exploit code.

All Zammad Zammad vulnerabilities

Sources

Also known as GHSA-7wgm-v99f-436j.