What is CVE-2021-35301?

CVE-2021-35301 is a medium-severity vulnerability in Zammad. CVSS score: 5.3/10. Published 2021-06-28.

How severe is CVE-2021-35301?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Zammad

CVE-2021-35301

Incorrect Access Control in Zammad 1.0.x up to 4.0.0 allows remote attackers to obtain sensitive information via the Ticket Article detail view.

Published 2021-06-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Zammad

References

zammad.com/en/advisories/zaa-2021-05 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-35301?: CVE-2021-35301 is a medium-severity vulnerability in Zammad. CVSS score: 5.3/10. Published 2021-06-28.
How severe is CVE-2021-35301?: Medium severity. CVSS v3 base score is 5.3 out of 10.