Headline
GHSA-r97q-ghch-82j9: Ghost vulnerable to information disclosure of private API fields
Impact
Due to a lack of validation when filtering on the public API endpoints, it is possible to reveal private fields via a brute force attack.
Ghost(Pro) has already been patched. We can find no evidence that the issue was exploited on Ghost(Pro) prior to the patch being added.
Self-hosters are impacted if running Ghost a version below v5.46.1. Immediate action should be taken to secure your site - see patches and workarounds below.
Patches
v5.46.1 contains a fix for this issue.
Workarounds
Add a block for requests to /ghost/api/content/* where the filter query parameter contains password or email.
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
Impact
Due to a lack of validation when filtering on the public API endpoints, it is possible to reveal private fields via a brute force attack.
Ghost(Pro) has already been patched. We can find no evidence that the issue was exploited on Ghost(Pro) prior to the patch being added.
Self-hosters are impacted if running Ghost a version below v5.46.1. Immediate action should be taken to secure your site - see patches and workarounds below.
Patches
v5.46.1 contains a fix for this issue.
Workarounds
Add a block for requests to /ghost/api/content/* where the filter query parameter contains password or email.
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
References
- GHSA-r97q-ghch-82j9
- TryGhost/Ghost@b3caf16
- https://github.com/TryGhost/Ghost/releases/tag/v5.46.1
Related news
Ghost is an app for new-media creators with tools to build a website, publish content, send newsletters, and offer paid subscriptions to members. Prior to version 5.46.1, due to a lack of validation when filtering on the public API endpoints, it is possible to reveal private fields via a brute force attack. Ghost(Pro) has already been patched. Maintainers can find no evidence that the issue was exploited on Ghost(Pro) prior to the patch being added. Self-hosters are impacted if running Ghost a version below v5.46.1. v5.46.1 contains a fix for this issue. As a workaround, add a block for requests to `/ghost/api/content/*` where the `filter` query parameter contains `password` or `email`.