CVE-2021-42137

Name: CVE-2021-42137
Creator: NVD / NIST
Published: 2021-10-11T05:15:06.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2021-42137 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in Zammad before 5.0.1. In some cases, there is improper enforcement of the privilege requirement for viewing a list of tickets that shows title, state, etc.. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

An issue was discovered in Zammad before 5.0.1. In some cases, there is improper enforcement of the privilege requirement for viewing a list of tickets that shows title, state, etc.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.81%

52.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Zammad	Zammad	< 5.0.1

References

https://zammad.com/en/advisories/zaa-2021-19Vendor Advisory
https://zammad.com/en/advisories/zaa-2021-19Vendor Advisory

Timeline

Published: Oct 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42137?

An issue was discovered in Zammad before 5.0.1. In some cases, there is improper enforcement of the privilege requirement for viewing a list of tickets that shows title, state, etc.

How severe is CVE-2021-42137?

CVE-2021-42137 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42137?

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-2021-42137?

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

Scan your code now

Source: NVD / NIST