CVE-2020-10099

Name: CVE-2020-10099
Creator: NVD / NIST
Published: 2020-03-05T01:15:11.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2020-10099 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An XSS issue was discovered in Zammad 3.0 through 3.2. Malicious code can be provided by a low-privileged user through the Ticket functionality in Zammad. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

An XSS issue was discovered in Zammad 3.0 through 3.2. Malicious code can be provided by a low-privileged user through the Ticket functionality in Zammad. The malicious JavaScript will execute within the browser of any user who opens the ticket or has the ticket within the Toolbar.

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

0.55%

41.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Zammad	Zammad	>= 1.0.0, <= 3.2.0

References

https://zammad.com/news/security-advisory-zaa-2020-01Patch, Vendor Advisory
https://zammad.com/news/security-advisory-zaa-2020-01Patch, Vendor Advisory

Timeline

Published: Mar 5, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10099?

How severe is CVE-2020-10099?

CVE-2020-10099 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10099?

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-2020-10099?

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

Scan your code now

Source: NVD / NIST