VULNERABILITY INTELLIGENCE

CVE-2017-12158

CVSS score5.4 MEDIUM
EPSS probability1.02%
CISA KEVNot currently listed
Published2017-10-26
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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.

Weakness classification

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Primary references