CVE-2021-27912: Acquia Mautic

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

Mautic versions before 3.3.4/4.0.0 are vulnerable to an inline JS XSS attack when viewing Mautic assets by utilizing inline JS in the title and adding a broken image URL as a remote asset. This can only be leveraged by an authenticated user with permission to create or edit assets.

Affected products

• Acquia Mautic: before 3.3.4 (fixed in 3.3.4); version 4.0.0 only

Published 2021-08-30. Last modified 2026-06-17.