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.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-944x-pm95-3jpr | Ghost: File Upload Content-Type Spoofing |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 25 Jun 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Thu, 25 Jun 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Ghost
Ghost ghost |
|
| Vendors & Products |
Ghost
Ghost ghost |
Wed, 24 Jun 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Ghost: File Upload Content-Type Spoofing | |
| Weaknesses | CWE-434 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-25T13:17:23.333Z
Reserved: 2026-06-11T15:50:01.281Z
Link: CVE-2026-53948
Updated: 2026-06-25T13:17:19.996Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-25T13:15:03Z
Weaknesses
Github GHSA