CVE-2018-10084: Cmsmadesimple CMS Made Simple

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

CMS Made Simple (CMSMS) through 2.2.6 contains a privilege escalation vulnerability from ordinary user to admin user by arranging for the eff_uid value within $_COOKIE[$this->_loginkey] to equal 1, because an SHA-1 cryptographic protection mechanism can be bypassed.

Affected products

• Cmsmadesimple CMS Made Simple: up to and including 2.2.6

Published 2018-04-13. Last modified 2026-06-17.