CVE-2017-9442: Bigtreecms Bigtree CMS

High severity, CVSS 8.8. EPSS: 2.5% chance of exploitation in the next 30 days.

BigTree CMS through 4.2.18 allows remote authenticated users to execute arbitrary code by uploading a crafted package containing a PHP web shell, related to extraction of a ZIP archive to filename patterns such as cache/package/xxx/yyy.php. This issue exists in core\admin\modules\developer\extensions\install\unpack.php and core\admin\modules\developer\packages\install\unpack.php. NOTE: the vendor states "You must implicitly trust any package or extension you install as they all have the ability to write PHP files.

Affected products

• Bigtreecms Bigtree CMS: up to and including 4.2.18

Published 2017-06-05. Last modified 2026-06-17.