CVE-2021-42091
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
- Record
CVE-2021-42091- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
- Record
CVE-2021-42091- Updated
- 2026-11-02
EUVDEUVD-2021-29077 No score
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
- Record
EUVD-2021-29077- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5r44-73x5-fmpr No score
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
- Record
GHSA-5r44-73x5-fmpr- Weakness
- CWE-918
- Updated
- 2026-11-02
OSV
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
- Record
CVE-2021-42091- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42091 is a critical vulnerability (CVSS 9.1) in Zammad, published October 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. No source names a fixed version.