GHSA-pr22-p9rp-2cqv: Ghost: Cross-Site Scripting in Feature Image Captions

Impact An input validation issue allowed any staff user to create a post with content that could be used to hijack another staff user's Ghost Admin session resulting in privilege escalation. Vulnerable versions This vulnerability is present in Ghost from v4.9.0 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. References Ghost thanks Versa for disclosing this vulnerability responsibly. For more information If you have any questions or comments about this advisory, email Ghost at security@ghost.org.