Ghost: Database Backup Path Traversal

Impact

An Administrator-level user could remotely overwrite certain files on the filesystem leading to integrity and availability issues.

Vulnerable versions

This vulnerability is present in Ghost from 1.20.1 up to v6.54.0.

Patches

v6.54.1 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.

Workarounds

If upgrading immediately is not possible, set disableJSBackups to "true" by running:

$ ghost config set disableJSBackups true
$ ghost restart

References

Ghost thanks Jorian Woltjer of Aikido Security, Mitchell Benjamin of Revamp Studio, and meifukun for disclosing this vulnerability responsibly.

For more information

If you have any questions or comments about this advisory, email Ghost at security@ghost.org.