CVE-2020-10100 Missing authorization in n/a

What is CVE-2020-10100?

CVE-2020-10100 is a medium-severity missing authorization vulnerability in Zammad Zammad, published on 5 Mar 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2020-10100?

It affects 1 product.

Products include Zammad Zammad.

How do I fix CVE-2020-10100?

No fix has been published for CVE-2020-10100 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-10100 being exploited?

There is no known exploitation of CVE-2020-10100 in the wild and no public exploit code.

Other vulnerabilities in Zammad Zammad

• CVE-2026-102489 Zammad GmbH Zammad Session Fixation Exploited High 8.7
• CVE-2026-102490 Zammad GmbH Zammad Improper Privilege Management Exploited High 8.5
• CVE-2022-48021 Code injection in n/a Critical 9.8
• CVE-2022-35490 Security feature bypass in n/a Critical 9.8
• CVE-2021-42090 Deserialization in n/a Critical 9.8

All Zammad Zammad vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-w8qq-9h49-v34p.