CVE-2023-40027 Conditionally missing authorization in @keystone-6/core
Attackers can access admin metadata without authentication if ui.isAccessAllowed is undefined, exposing sensitive configuration data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-40027?
CVE-2023-40027 is a low-severity missing authorization vulnerability in keystonejs keystone, published on 15 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Keystone is an open source headless CMS for Node.js — built with GraphQL and React. When `ui.isAccessAllowed` is set as `undefined`, the `adminMeta` GraphQL query is publicly accessible (no session required). This is different to the behaviour of the default AdminUI middleware, which by default will only be publicly accessible (no session required) if a `session` strategy is not defined. This vulnerability does not affect developers using the `@keystone-6/auth` package, or any users that have written their own `ui.isAccessAllowed` (that is to say, `isAccessAllowed` is not `undefined`). This vulnerability does affect users who believed that their `session` strategy will, by default, enforce that `adminMeta` is inaccessible by the public in accordance with that strategy; akin to the behaviour of the AdminUI middleware. This vulnerability has been patched in `@keystone-6/core` version `5.5.1`. Users are advised to upgrade. Users unable to upgrade may opt to write their own `isAccessAllowed` functionality to work-around this vulnerability.
Weakness: CWE-862
Which versions are affected by CVE-2023-40027?
2 open source packages ship an affected version, including @keystone-6/core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@keystone-6/core npm | All versions | 5.5.1 |
@keystone-6/core npm | All versions | 5.5.1 |
Products include Keystonejs Keystone.
How do I fix CVE-2023-40027?
Upgrade @keystone-6/core to 5.5.1 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2023-40027 being exploited?
There is no known exploitation of CVE-2023-40027 in the wild and no public exploit code.
Other vulnerabilities in keystonejs keystone
- CVE-2022-39382 NODE_ENV in Keystone defaults to development with esbuild
- CVE-2022-29354 File upload in n/a
- CVE-2022-39322 @keystone-6/core vulnerable to field-level access-control bypass for multiselect field
- CVE-2017-16570 Cross-Site Request Forgery (CSRF) in keystone
- CVE-2017-15879 Keystone is vulnerable to CSV injection
Sources
Also known as GHSA-9cvc-v7wm-992c.