CVE-2018-25353: Redaxo CMS Mediapool

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Redaxo CMS Mediapool Addon 5.5.1 and older contains an arbitrary file upload vulnerability that allows authenticated users to bypass file extension blacklist restrictions. Attackers with editor accounts can upload executable files by using obfuscated extensions like php71 or php53 to evade the blacklist filter and execute arbitrary code.

Affected products

• Redaxo Redaxo CMS Mediapool: up to and including 5.5.1

Published 2026-05-23. Last modified 2026-07-23.