Multiple vulnerabilities in Red Hat build of Keycloak 26.0



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2025-0604
CVE-2025-1391
CVE-2020-11023
CVE-2025-21502
CWE-ID CWE-287
CWE-284
CWE-79
CWE-20
Exploitation vector Network
Public exploit Vulnerability #3 is being exploited in the wild.
Vulnerable software
 Red Hat build of Keycloak
Server applications / Other server solutions

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) 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

Exploit availability: No

Description

The vulnerability allows a remote user to bypass authentication process.

The vulnerability exists due to Keycloak does not perform an LDAP bind after a password reset. A remote user can bypass authentication process for expired or disabled AD accounts gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat build of Keycloak: before 26.0.10

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2025:2544


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) 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

Red Hat build of Keycloak: before 26.0.10

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2025:2544


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

3) Cross-site scripting

EUVDB-ID: #VU27519

Risk: Low

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:A/U:Clear]

CVE-ID: CVE-2020-11023

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when passing <option> elements to jQuery’s DOM manipulation methods. A remote attacker can execute arbitrary JavaScript code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat build of Keycloak: before 26.0.10

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2025:2544


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

4) Improper input validation

EUVDB-ID: #VU103159

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/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-2025-21502

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The vulnerability exists due to improper input validation within the Hotspot component in Oracle GraalVM Enterprise Edition. A remote non-authenticated attacker can exploit this vulnerability to read and manipulate data.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat build of Keycloak: before 26.0.10

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2025:2544


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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



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