Auth bypass in Zammad

CVE-2020-26028

An issue was discovered in Zammad before 3.4.1. Admin Users without a ticket.* permission can access Tickets.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.9% 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-2020-26028: held from 0.009 to 0.009.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-26028?
CVE-2020-26028 is a medium-severity vulnerability in Zammad, classified under Incorrect Authorization. CVSS score: 4.9/10. Published 2020-12-28.
How severe is CVE-2020-26028?
Medium severity. CVSS v3 base score is 4.9 out of 10.