CVE-2018-14655

Severity: medium (CVSS 5.4 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-11-13 · updated 2026-06-17
Weakness: CWE-79

Description

A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. When using 'response_mode=form_post' it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.

Affected products

Keycloak: 3.4.3, 4.0.0-beta2, 4.3.0
Red Hat Single Sign-On: 7.2

References

https://access.redhat.com/errata/RHSA-2018:3592
https://access.redhat.com/errata/RHSA-2018:3593
https://access.redhat.com/errata/RHSA-2018:3595
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655
https://access.redhat.com/errata/RHSA-2018:3592
https://access.redhat.com/errata/RHSA-2018:3593
https://access.redhat.com/errata/RHSA-2018:3595
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655

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