CVE-2020-27838

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.

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v2.0

4.3 MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

17.94% chance of exploitation in the next 30 days, 97th percentile

Nuclei

medium · CWE-287

Published

2021-03-08

Updated

2024-08-04

Proof-of-concept exploits (1)

• Cappricio-Securities/CVE-2020-278382★ · 2024-06-24

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-27838.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2000-0114
• CVE-2009-0347
• CVE-2012-5321
• CVE-2015-1635
• CVE-2015-7297
• CVE-2017-7269