CVE-2023-31133: Ghost vulnerable to 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 security@ghost.org
Other sources
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2023-31133?
CVE-2023-31133 is considered to have a medium severity due to its potential for exposing private fields via brute force attacks.
How do I fix CVE-2023-31133?
To fix CVE-2023-31133, you should upgrade to Ghost version 5.46.1 or later.
What systems are affected by CVE-2023-31133?
CVE-2023-31133 affects all versions of Ghost prior to version 5.46.1.
Is CVE-2023-31133 being exploited in the wild?
There is currently no evidence that CVE-2023-31133 has been exploited in the wild prior to the release of the patch.
What specific vulnerability does CVE-2023-31133 address?
CVE-2023-31133 addresses a lack of validation when filtering on the public API, which could allow brute force attacks to reveal private fields.