CVE-2017-12158
An attacker could use this flaw against an authenticated user to attain reflected XSS via a malicious server.
Does this matter?
Lower severity and a low EPSS score (1.02%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.4 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.02% probability · 63th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-444, CWE-79
- Affected
- redhat/single sign on · keycloak/keycloak
- Source
- secalert@redhat.com
EPSS 1.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/101618Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:2904Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2905Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2906Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1489161Issue Tracking
- http://www.securityfocus.com/bid/101618Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:2904Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2905Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2906Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1489161Issue Tracking
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.