CVE-2021-42092

Name: CVE-2021-42092
Creator: NVD / NIST
Published: 2021-10-07T20:15:07.79+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2021-42092 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An issue was discovered in Zammad before 4.1.1. Stored XSS may occur via an Article during addition of an attachment to a Ticket.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

An issue was discovered in Zammad before 4.1.1. Stored XSS may occur via an Article during addition of an attachment to a Ticket.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.50%

39.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Zammad	Zammad	< 4.1.1

References

https://zammad.com/en/advisories/zaa-2021-16Vendor Advisory
https://zammad.com/en/advisories/zaa-2021-16Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-42092?

An issue was discovered in Zammad before 4.1.1. Stored XSS may occur via an Article during addition of an attachment to a Ticket.

How severe is CVE-2021-42092?

CVE-2021-42092 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42092?

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-2021-42092?

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

Scan your code now

Source: NVD / NIST