CVE-2021-28935: Cmsmadesimple CMS Made Simple

Medium severity, CVSS 5.4. EPSS: 1.6% chance of exploitation in the next 30 days.

CMS Made Simple (CMSMS) 2.2.15 allows authenticated XSS via the /admin/addbookmark.php script through the Site Admin > My Preferences > Title field.

Affected products

• Cmsmadesimple CMS Made Simple: version 2.2.15 only

Published 2021-03-30. Last modified 2026-06-17.