Impact

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.

Patches

Upgrade to 3.3.4 or 4.0.0

Workarounds

No

References

https://github.com/mautic/mautic/releases/tag/3.3.4
https://github.com/mautic/mautic/releases/tag/4.0.0

For more information

If you have any questions or comments about this advisory:

• Email us at security@mautic.org

References

• GHSA-72hm-fx78-xwhc
• https://nvd.nist.gov/vuln/detail/CVE-2021-27911
• https://github.com/FriendsOfPHP/security-advisories/blob/master/mautic/core/CVE-2021-27911.yaml