Vulnerability GHSA-788w-68h3-cvxp

Impact

An image processing library bundled with Ghost contained a vulnerability in its SVG handling. Any staff user, including Contributors, could create a bookmark card for an attacker-controlled website, resulting in arbitrary commands being run on the Ghost server.

Vulnerable versions

This vulnerability is present in Ghost from v6.56.0 up to v6.65.0.

Patches

v6.67.0 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

We thank Rafael B. for disclosing this vulnerability responsibly.

For more information

If you have any questions or comments about this advisory, email us at [email protected].