CVE-2017-12158

lowpriority · track · 22EPSS 0.010 · 63 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.02% (63rd) EPSS

CVSS 3.5 · low

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

5.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.5–5.4

v2.03.5lowAV:N/AC:M/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 6.8 · impact 2.9

v3.05.4mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.05.4mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · OSV

v3.05mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-444USCWE-79US

affected products (5)

Products and version ranges known to be affected.

Red Hat, Inc. KeyCloak≤ 3.4.0enisa_euvdEU
keycloak keycloakall versionsnvdUScpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*
redhat single sign on= 7.0nvdUScpe:2.3:a:redhat:single_sign_on:*:*:*:*:*:*:*:*
redhat single sign on= 7.1nvdUScpe:2.3:a:redhat:single_sign_on:*:*:*:*:*:*:*:*
Maven org.keycloak:keycloak-parent< 3.4.0osvUSpkg:maven/org.keycloak/keycloak-parent

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-v38p-mqq3-m6v5Keycloak Reflected XSS2022-05-13ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2017-10-26modified 2026-06-17

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+53049 more

references (15)

External citations — patches, advisories, analysis.

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