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CVE-2017-12158

21
FAUCET Score

CVE-2017-12158 describes a reflected Cross-Site Scripting (XSS) vulnerability in Keycloak, affecting various Keycloak and Red Hat Enterprise Linux Single Sign-On products. An authenticated attacker could exploit this flaw by manipulating the HOST header in the admin console, leading to the execution of malicious scripts in the victim's browser. With a CVSS score of 5.4 (Medium), this vulnerability requires user interaction and low privileges, potentially resulting in limited impact on confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign_on:7.0:*:*:*:*:*:*:*
7.1CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign_on:7.1:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:keycloak:keycloak:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.02%
Probability of exploitation in next 30 days
EPSS Percentile
59.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0102 is in the 93rd percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

mavenpatch availablevia ghsa
Product: org.keycloak:keycloak-parentFixed in: 3.4.0
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.1 for RHEL 6Fixed in: rh-sso7-keycloak-0:2.5.14-1.Final_redhat_1.1.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.1 for RHEL 7Fixed in: rh-sso7-keycloak-0:2.5.14-1.Final_redhat_1.1.jbcs.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Mobile Application Platform 4Fixed in: keycloak

Vendor Advisories (2)

mavenGHSA-v38p-mqq3-m6v5medium

Keycloak Reflected XSS

May 13, 2022
redhatCVE-2017-12158Moderate

keycloak: reflected XSS using HOST header

Oct 17, 2017

References

access.redhat.com / errata/RHSA-2017:2904
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2905
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2906
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
securityfocus.com / bid/101618
Third Party AdvisoryVDB Entry