Multiple vulnerabilities in Keycloak

Published: 2025-03-11

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2025-1391 CVE-2025-0604
CWE-ID	CWE-284 CWE-287
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Keycloak Server applications / Directory software, identity management
Vendor	Keycloak

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU105509

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-1391

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper mapping of users to organizations based solely on email/username patterns. A remote attacker can trick an organization administrator into allowing user access based on naming pattern if, for example, self-registration is enabled and unrestricted.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Keycloak: 26.0.0 - 26.1.2

CPE2.3

cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*

External links

https://github.com/keycloak/keycloak/security/advisories/GHSA-gvgg-2r3r-53x7

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper authentication

EUVDB-ID: #VU105508

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-0604

CWE-ID: CWE-287 - Improper Authentication