CVE-2021-39192
Privilege escalation: all users can access Admin-level API keys
Description
### Impact An error in the implementation of the limits service in 4.0.0 allows all authenticated users (including contributors) to view admin-level API keys via the integrations API endpoint, leading to a privilege escalation vulnerability. Ghost(Pro) has already been patched. Self-hosters are impacted if running Ghost a version between 4.0.0 and 4.9.4. Immediate action should be taken to secure your site - see patches & workarounds below. It is highly recommended to regenerate all API keys after patching or applying the workaround below. ### Patches Fixed in 4.10.0, all 4.x sites should upgrade as soon as possible. ### Workarounds - Disable all non-Administrator accounts to prevent API access. ### For more information If you have any questions or comments about this advisory: * email us at security@ghost.org --- Credits: Aden Yap Chuen Zhen, BAE Systems Applied Intelligence (Malaysia)
How to fix CVE-2021-39192
To remediate CVE-2021-39192, upgrade the affected package to a fixed version below.
- —upgrade to 4.10.0 or later
- —upgrade to 4.10.0 or later
Is CVE-2021-39192 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 4.0.0, < 4.10.0
- >= 4.0.0, < 4.10.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |