UpHeron
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Servers and applications

CVE-2021-27911

XSS vulnerability on contacts view

Severity
Medium 6.1
Published
30 Aug 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.3.4
Also known as
GHSA-72hm-fx78-xwhc
Sources
NVD, Project advisories (GitHub)

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.

Affected software

SoftwareAffected versions
MauticServers and applications · cpe:a:acquia:mautic
  • Every version before 3.3.4
  • Version 4.0.0-alpha1
  • Version 4.0.0-beta
  • Version 4.0.0-rc
MauticServers and applications · github:mautic/mautic
  • Every version before 3.3.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-27911
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-27911
  • GitHub Advisory Database https://github.com/advisories/GHSA-72hm-fx78-xwhc
  • github.com https://github.com/mautic/mautic/security/advisories/GHSA-72hm-fx78-xwhc