Auth bypass in Red Hat Keycloak
CVE-2021-20262
A flaw was found in Keycloak 12.0.0 where re-authentication does not occur while updating the password. This flaw allows an attacker to take over an account if they can obtain temporary, physical access to a user’s browser. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (23.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Red Hat Keycloak — versions 12.0.0
- Red Hat Single Sign-On — versions 7.0
- Keycloak — versions Keycloak 12.0.0
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20262?
- CVE-2021-20262 is a medium-severity vulnerability in Red Hat Keycloak, classified under Missing Authentication for Critical Function. CVSS score: 6.8/10. Published 2021-03-09.
- How severe is CVE-2021-20262?
- Medium severity. CVSS v3 base score is 6.8 out of 10.