CVE-2021-27909: Acquia Mautic

Medium severity, CVSS 6.1. EPSS: 4.1% chance of exploitation in the next 30 days.

For Mautic versions prior to 3.3.4/4.0.0, there is an XSS vulnerability on Mautic's password reset page where a vulnerable parameter, "bundle," in the URL could allow an attacker to execute Javascript code. The attacker would be required to convince or trick the target into clicking a password reset URL with the vulnerable parameter utilized.

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.