CVE-2017-16920: Finecms

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

v5/config/system.php in dayrui FineCms 5.2.0 has a default SYS_KEY value and does not require key regeneration for each installation, which allows remote attackers to upload arbitrary .php files via a member api swfupload action to index.php.

Affected products

• Finecms Finecms: version 5.2.0 only

Published 2017-11-21. Last modified 2026-06-17.