Auth bypass in Zammad
CVE-2020-29158
An issue was discovered in Zammad before 3.5.1. An Agent with Customer permissions in a Group can bypass intended access control on internal Articles via the Ticket detail view.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
Weakness classification (CWE)
References
- zammad.com/en/advisories/zaa-2020-23 (Vendor Advisory)
- github.com/zammad/zammad/commit/cf5a5e396058d4b134dd33d0a62b11c1733c98ab (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-29158?
- CVE-2020-29158 is a medium-severity vulnerability in Zammad, classified under Missing Authorization. CVSS score: 4.3/10. Published 2020-12-28.
- How severe is CVE-2020-29158?
- Medium severity. CVSS v3 base score is 4.3 out of 10.