CVE-2020-8439: Monstra

Medium severity, CVSS 6.5. EPSS: 1.6% chance of exploitation in the next 30 days.

Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.

Affected products

• Monstra Monstra: up to and including 3.0.4

Published 2020-03-07. Last modified 2026-06-17.