CVE-2021-42087

Name: CVE-2021-42087
Creator: NVD / NIST
Published: 2021-10-07T21:15:07.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-42087 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. An issue was discovered in Zammad before 4.1.1. An admin can discover the application secret via the API.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

An issue was discovered in Zammad before 4.1.1. An admin can discover the application secret via the API.

Metrics

CVSS 3.1

4.9/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.85%

53.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Zammad	Zammad	< 4.1.1

References

https://zammad.com/en/advisories/zaa-2021-15Vendor Advisory
https://zammad.com/en/advisories/zaa-2021-15Vendor Advisory

Timeline

Published: Oct 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42087?

An issue was discovered in Zammad before 4.1.1. An admin can discover the application secret via the API.

How severe is CVE-2021-42087?

CVE-2021-42087 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42087?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42087?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST