CVE-2021-40889: Cmsuno Project Cmsuno

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

CMSUno version 1.7.2 is affected by a PHP code execution vulnerability. sauvePass action in {webroot}/uno/central.php file calls to file_put_contents() function to write username in password.php file when a user successfully changed their password. The attacker can inject malicious PHP code into password.php and then use the login function to execute code.

Affected products

• Cmsuno Project Cmsuno: version 1.7.2 only

Published 2021-10-11. Last modified 2026-06-17.