Affected: Bitnami: ghost

Ghost is a Node.js content management system. From 1.20.1 until 6.54.1, an Administrator-level user could remotely overwrite certain files on the filesystem through the database backup filename, leading to integrity and availability issues. The database export endpoint failed to reject path separators in the caller-supplied filename. This issue is fixed in version 6.54.1.

Ghost is a Node.js content management system. From 1.20.1 until 6.54.1, an Administrator-level user could remotely overwrite certain files on the filesystem through the database backup filename, leading to integrity and availability issues. The database export endpoint failed to reject path separators in the caller-supplied filename. This issue is fixed in version 6.54.1.

Affected: npm: ghost

### 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](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost).

If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update).

### Workarounds

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

```sh $ 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](mailto:security@ghost.org).