Ghost is a Node.js content management system. From 0.10.0 until 6.54.1, a vulnerability in custom themes allowed a staff user to write files outside of the uploads directory. This could be used to alter the behavior of the installation through custom theme upload path traversal in LocalStorageBase and theme storage name handling.
This issue is fixed in version 6.54.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://github.com/TryGhost/Ghost/commit/fbaa92327e52607036a1e42204c9eadcc751d8…
security-advisories@github.com
https://github.com/TryGhost/Ghost/releases/tag/v6.54.1
security-advisories@github.com
https://github.com/TryGhost/Ghost/security/advisories/GHSA-cjc9-q5gf-327p
security-advisories@github.com