What’s Vulnerable › Vulnerabilities

CVE-2017-12158

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-10-26 · updated 2026-06-17
• Weakness: CWE-444

Description

It was found that Keycloak would accept a HOST header URL in the admin console and use it to determine web resource locations. An attacker could use this flaw against an authenticated user to attain reflected XSS via a malicious server.

Affected products

• Keycloak: all versions
• RedHat Single Sign On: 7.0, 7.1

References

• http://www.securityfocus.com/bid/101618
• https://access.redhat.com/errata/RHSA-2017:2904
• https://access.redhat.com/errata/RHSA-2017:2905
• https://access.redhat.com/errata/RHSA-2017:2906
• https://bugzilla.redhat.com/show_bug.cgi?id=1489161
• http://www.securityfocus.com/bid/101618
• https://access.redhat.com/errata/RHSA-2017:2904
• https://access.redhat.com/errata/RHSA-2017:2905
• https://access.redhat.com/errata/RHSA-2017:2906
• https://bugzilla.redhat.com/show_bug.cgi?id=1489161

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