CVE-2021-42091 Server-side request forgery in n/a

Critical 9.1 Published 7 Oct 2021 Updated 4 Aug 2024

Attackers can exploit Server-Side Request Forgery in Zammad's GitHub or GitLab integrations to access internal resources.

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-2021-42091?

CVE-2021-42091 is a critical server-side request forgery vulnerability in Zammad Zammad, published on 7 Oct 2021. 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 4.1.1. SSRF can occur via GitHub or GitLab integration.

Weakness: CWE-918

Which versions are affected by CVE-2021-42091?

It affects 1 product.

Products include Zammad Zammad.

How do I fix CVE-2021-42091?

No fix has been published for CVE-2021-42091 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2021-42091 being exploited?

There is no known exploitation of CVE-2021-42091 in the wild and no public exploit code.

All Zammad Zammad vulnerabilities

Sources

Also known as GHSA-5r44-73x5-fmpr.