Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, SVG images included in content imports were stored without sanitization. An attacker who convinced an Administrator to import a crafted file could host scripts on the site's domain, possibly resulting in compromise of staff users' admin sessions. This issue is fixed in version 6.67.0.
https://github.com/TryGhost/Ghost/security/advisories/GHSA-hqq2-xqr2-fmx2
https://github.com/TryGhost/Ghost/releases/tag/v6.66.0
https://github.com/TryGhost/Ghost/pull/31060
https://github.com/TryGhost/Ghost/commit/1be06f4e95a5eb159d14abda7660e689af13cff1