All intelligence
// vulnerability record
cached · NVD via COSMOS syncCVE-2026-53948
MEDIUMpublished 2026-06-24 19:17 UTC · 4 days ago · modified 2026-06-25 16:07 UTC
5.4
CVSS / 10
// description
Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, insufficient validation of the client-supplied Content-Type on Ghost's Admin API file upload endpoint allowed uploaded files to be served from the site with an attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the site, this could have been used to facilitate stored cross-site scripting against site visitors or staff. This vulnerability is fixed in 6.21.1.
// cvss 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
// weaknesses (CWE)
- CWE-434