CVE-2021-25977: Dotnetfoundation Piranha CMS

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

In PiranhaCMS, versions 7.0.0 to 9.1.1 are vulnerable to stored XSS due to the page title improperly sanitized. By creating a page with a specially crafted page title, a low privileged user can trigger arbitrary JavaScript execution.

Affected products

• Dotnetfoundation Piranha CMS: from 7.0.0, up to and including 9.1.1

Published 2021-10-25. Last modified 2026-06-17.