CVE-2023-0264

HIGH8.7EPSS 3.9%

Keycloak vulnerable to user impersonation via stolen UUID code

Published: 3/2/2023Modified: 2/4/2026

Description

Keycloak's OpenID Connect user authentication was found to incorrectly authenticate requests. An authenticated attacker who could also obtain a certain piece of info from a user request, from a victim within the same realm, could use that data to impersonate the victim and generate new session tokens.

Affected packages (1)

Maven/org.keycloak:keycloak-servicesfrom 0, < 21.0.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH8.7	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References (5)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2023-0264
PATCHhttps://github.com/keycloak/keycloak
WEBhttps://access.redhat.com/security/cve/CVE-2023-0264
WEBhttps://github.com/keycloak/keycloak/commit/ec8109112e67208c13e13f6d1f8706a5a3ba8d4c
WEBhttps://github.com/keycloak/keycloak/security/advisories/GHSA-9g98-5mj6-f9mv