CVE-2021-39136: Basercms

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

baserCMS is an open source content management system with a focus on Japanese language support. In affected versions there is a cross-site scripting vulnerability in the file upload function of the management system of baserCMS. Users are advised to update as soon as possible. No workaround are available to mitigate this issue.

Affected products

• Basercms Basercms: before 4.5.1 (fixed in 4.5.1)

Published 2021-08-25. Last modified 2026-06-17.