GHSA-x5mm-wm4g-j5xv
Ghost: Server-Side Request Forgery Mitigation Issue
Quick fix
GHSA-x5mm-wm4g-j5xv — ghost: upgrade to the fixed version with the command below.
npm install ghost@6.54.1Details
### Impact
A validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network. A successful attack would not result in any response data being returned.
### Vulnerable versions
This vulnerability is present in Ghost from v6.26.0 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](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).
### References
Ghost thanks Hwang Seyeon 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).
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