GHSA-x5mm-wm4g-j5xv: SSRF
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. 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 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
npm/ghostto a version that resolves this vulnerability.Fixed in 6.54.1 - Upgrade
Upgrade
Ghostto a version that resolves this vulnerability.Fixed in 6.54.1
Event History
Frequently Asked Questions
What is the severity of GHSA-x5mm-wm4g-j5xv?
The severity of GHSA-x5mm-wm4g-j5xv is rated as medium.
How do I fix GHSA-x5mm-wm4g-j5xv?
To fix GHSA-x5mm-wm4g-j5xv, ensure your Ghost installation is updated to the latest version that addresses this vulnerability.
What impact does GHSA-x5mm-wm4g-j5xv have on my system?
GHSA-x5mm-wm4g-j5xv allows unauthenticated users to make limited HTTP requests to internal network hosts but does not return any response data.
What type of vulnerability is GHSA-x5mm-wm4g-j5xv?
GHSA-x5mm-wm4g-j5xv is classified as a Server-Side Request Forgery (SSRF) vulnerability.
What versions of Ghost are affected by GHSA-x5mm-wm4g-j5xv?
GHSA-x5mm-wm4g-j5xv affects certain versions of the Ghost software, so users should check for specific affected versions in their installations.