CVE-2021-27911

XSS vulnerability on contacts view

Description

Mautic versions before 3.3.4/4.0.0 are vulnerable to an inline JS XSS attack through the contact's first or last name and triggered when viewing a contact's details page then clicking on the action drop down and hovering over the Campaigns button. Contact first and last name can be populated from different sources such as UI, API, 3rd party syncing, forms, etc.

Category

8.3
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.35%
Third-Party Advisory github.com
Affected: Mautic Mautic
Published at:
Updated at:

References

Link Tags
https://github.com/mautic/mautic/security/advisories/GHSA-72hm-fx78-xwhc third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-27911?
CVE-2021-27911 has been scored as a high severity vulnerability.
How to fix CVE-2021-27911?
To fix CVE-2021-27911, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27911 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-27911 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27911?
CVE-2021-27911 affects Mautic Mautic.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.