Vulnerability · Published Mar 8, 2021 · Assigned by redhat
CVE-2020-27838
Medium 6.5
In plain English
A medium-severity improper authentication in keycloak. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 17.9% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in keycloak in versions prior to 13.0.0. The client registration endpoint allows fetching information about PUBLIC clients (like client secret) without authentication which could be an issue if the same PUBLIC client changed to CONFIDENTIAL later. The highest threat from this vulnerability is to data confidentiality.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.keycloak:keycloak-core | 13.0.0 | GHSA-pcv5-m2wh-66j3 |
Affected products (as reported)
Weakness: CWE-287
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1906797 x_refsource_MISC