CVE-2026-30878: Basercms

Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days.

baserCMS is a website development framework. Prior to version 5.2.3, a public mail submission API allows unauthenticated users to submit mail form entries even when the corresponding form is not accepting submissions. This bypasses administrative controls intended to stop form intake and enables spam or abuse via the API. This issue has been patched in version 5.2.3.

Affected products

• Basercms Basercms: before 5.2.3 (fixed in 5.2.3)

Published 2026-03-31. Last modified 2026-06-17.