CVE-2018-14655

Name: CVE-2018-14655
Creator: NVD / NIST
Published: 2018-11-13T19:29:00.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.19%

Last modified Jun 17, 2026

CVE-2018-14655 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.19% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.19%

64.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Redhat	Keycloak	3.4.3	—
Redhat	Keycloak	4.0.0	Beta2
Redhat	Keycloak	4.3.0	—
Redhat	Single Sign-On	7.2	—
Redhat	Single Sign-On	All versions	—

References

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

Timeline

Published: Nov 13, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-14655?

How severe is CVE-2018-14655?

Severity scoring for CVE-2018-14655 is pending analysis. The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.

How do I fix CVE-2018-14655?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-14655?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST