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CVE-2018-14655

20
FAUCET Score

CVE-2018-14655 is a cross-site scripting (XSS) vulnerability affecting Keycloak versions 3.4.3.Final, 4.0.0.Beta2, and 4.3.0.Final, as well as Red Hat Linux and Single Sign-On. An attacker can inject arbitrary JavaScript code via the 'state' parameter when 'response_mode=form_post' is used, leading to an XSS attack upon successful login. With a CVSS score of 5.4 (Medium), this vulnerability requires user interaction and successful authentication, but could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.4.3CPE matchmatch criteria
cpe:2.3:a:redhat:keycloak:3.4.3:*:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:a:redhat:keycloak:4.0.0:beta2:*:*:*:*:*:*
4.3.0CPE matchmatch criteria
cpe:2.3:a:redhat:keycloak:4.3.0:*:*:*:*:*:*:*
7.2CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign-on:7.2:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.6MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 94th percentile among its peer group of 15,239 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)

redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.2.5 zip
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.2 for RHEL 6Fixed in: rh-sso7-keycloak-0:3.4.14-1.Final_redhat_00001.1.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.2 for RHEL 7Fixed in: rh-sso7-keycloak-0:3.4.14-1.Final_redhat_00001.1.jbcs.el7
View patch
redhatvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Fuse 7Fixed in: keycloak

Vendor Advisories (2)

mavenGHSA-458h-wv48-fq75medium

Keycloak vulnerable to cross-site scripting via the state parameter

May 13, 2022
redhatCVE-2018-14655Moderate

keycloak: XSS-Vulnerability with response_mode=form_post

Nov 13, 2018

References

access.redhat.com / errata/RHSA-2018:3592
Vendor Advisory
access.redhat.com / errata/RHSA-2018:3593
Vendor Advisory
access.redhat.com / errata/RHSA-2018:3595
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory