An issue was discovered in Zammad 3.0 through 3.2.
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in Zammad 3.0 through 3.2. It allows for users to view ticket customer details associated with specific customers. However, the application does not properly implement access controls related to this functionality. As such, users of one company are able to access ticket data from other companies. Due to the multi-tenant nature of this application, users who can access ticket details from one organization to the next allows for users to exfiltrate potentially sensitive data of other companies.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* | 1.0.0 – 3.2.0 | Vulnerable | Zammad GmbH |
- cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* Versions 1.0.0 – 3.2.0 Vulnerable ·Zammad GmbH
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-10100
- 2026-10-03 Alias added: GHSA-w8qq-9h49-v34p
References
More Zammad GmbH Zammad vulnerabilities
- TI-2026-65406 Local privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package KEVCVSS 4.0CRITICAL 9.4
- TI-2026-65405 Undisclosed RCE in Zammad v6.3 and higher KEVCVSS 4.0CRITICAL 9.4
- TI-2024-22252 An issue was discovered in Zammad before 6.3.0. CVSS 3.1CRITICAL 9.1
- TI-2022-23785 A vulnerability in Zammad v5.3.0 allows attackers to execute arbitrary code or escalate… CVSS 3.1CRITICAL 9.8
- TI-2021-18599 An issue was discovered in Zammad before 4.1.1. CVSS 3.1CRITICAL 9.8
- TI-2021-18603 An issue was discovered in Zammad before 4.1.1. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-10100 · CVE Program
- CVE-2020-10100 · NVD
- FIRST EPSS
- GHSA-w8qq-9h49-v34p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences