SSRF in Zammad

CVE-2021-42091

An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-42091: held from 0.011 to 0.011.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-42091?
CVE-2021-42091 is a critical-severity vulnerability in Zammad, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2021-10-07.
How severe is CVE-2021-42091?
Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2021-42091 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.