Arbitrary file upload in Ghost - #VU151101
Published: September 18, 2026
Vulnerability identifier: #VU151101
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to compromise other staff users' admin sessions.
The vulnerability exists due to unrestricted upload of files with dangerous types in the default local storage adapter when uploading files. A remote user can upload a script file served with a content type derived from its file extension to compromise other staff users' admin sessions.
User interaction is required for a staff user to execute the uploaded script.
Affected software
Ghost
Remediation
Install security update from vendor's website.
Ghost - update to 6.64.0