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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TryGhost | Ghost | >= 6.19.4, < 6.21.1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | ghost | >= 6.19.4, < 6.21.1 | 6.21.1 | GHSA-944x-pm95-3jpr |