Ghost: Stored XSS via SVG Uploads Bypassing Sanitization
Impact
SVG media thumbnails, and SVG images uploaded with a non-SVG file extension, were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site's domain, possibly resulting in compromise of other staff users' admin sessions.
Vulnerable versions
This vulnerability is present in Ghost from v4.22.0 up to v6.64.0.
Patches
v6.65.0 contains a fix for this issue.
How to update
For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.
If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.
References
Ghost thanks Ibrahim AlJaafreh of Cystack Red Team, Anand Prajapati, 白墨, and Nhat Anh Vu for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments about this advisory, email us at security@ghost.org.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | ghost | >= 4.22.0, < 6.65.0 | 6.65.0 |
References
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4
- https://nvd.nist.gov/vuln/detail/CVE-2026-105649
- https://github.com/TryGhost/Ghost/issues/30919
- https://github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072
- https://github.com/TryGhost/Ghost
- https://github.com/TryGhost/Ghost/releases/tag/v6.65.0
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-434, CWE-79- Platform
- npm
- Package
ghost- Disclosed
- 07.10.2026
- Updated
- 13.10.2026 11:17
Sources and licenses
OSV / GitHub Advisory Database - GHSA-8575-cr6v-7jh4 - CC BY 4.0
Vulnerability history: ghost
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 61
- First → latest
- 04.2021 10.2026
- Without a fix
- 3
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 16
- Medium 38
- Low 3
Disclosures per year
- 2021: 5
- 2022: 4
- 2023: 3
- 2024: 3
- 2025: 1
- 2026: 45
-
Ghost: Stored XSS via SVG Uploads Bypassing Sanitization this entry
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