How severe is CVE-2018-14655?

CVE-2018-14655 has a CVSS score of 5.4/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2018-14655?

CVE-2018-14655 affects the following packages: org.keycloak:keycloak-parent (Maven), org.keycloak:keycloak-parent (Maven), org.keycloak:keycloak-parent (Maven). Ecosystems affected: Maven.

How do I fix CVE-2018-14655?

The records we use list no patched version of org.keycloak:keycloak-parent for CVE-2018-14655. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect CVE-2018-14655 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2018-14655 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2018-14655 actively exploited in the wild?

No public exploit code has been indexed for CVE-2018-14655 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2018-14655?

CVE-2018-14655 has an EPSS (Exploit Prediction Scoring System) score of 1.2%, placing it in the 68th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2018-14655?

CVE-2018-14655 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2018-14655 published, and has it been updated?

CVE-2018-14655 was published on November 13, 2018 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2018-14655 — keycloak-parent

MEDIUM

CVE-2018-14655 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in org.keycloak:keycloak-parent. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Keycloak vulnerable to cross-site scripting via the state parameter

Also known asGHSA-458h-wv48-fq75

Published

Nov 13, 2018

Updated

Oct 24, 2026

Affected

3 pkgs

Patched

See advisory

Exploits

None indexed

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs68th percentile — riskier than 68% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected

☕org.keycloak:keycloak-parent☕org.keycloak:keycloak-parent☕org.keycloak:keycloak-parent

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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 Packages

3 total

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.keycloak:keycloak-parent`	all versions	No fix
☕Maven	`org.keycloak:keycloak-parent`	≥ 4.0.0.Beta1	No fix
☕Maven	`org.keycloak:keycloak-parent`	all versions	No fix

Affected Products

2 products · 6 configurations

Application

keycloakredhat

3 versions

3.4.34.0.04.3.0

Application

single sign-onredhat

1 version

7.2

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of org.keycloak:keycloak-parent for CVE-2018-14655. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
Red Hat Single Sign-On 7.2.5 zip	see advisory	RHSA-2018:3595
Red Hat Single Sign-On 7.2 for RHEL 6	`rh-sso7-keycloak-0:3.4.14-1.Final_redhat_00001.1.jbcs.el6`	RHSA-2018:3592
Red Hat Single Sign-On 7.2 for RHEL 7	`rh-sso7-keycloak-0:3.4.14-1.Final_redhat_00001.1.jbcs.el7`	RHSA-2018:3593

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2018-14655 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.4/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

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

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

keycloak

9.3/10

Code-Review10/10

Maintained10/10

Branch-Protection8/10

Assessed Nov 2, 2026

Timeline

Disclosed

Nov 13, 2018

Last updated

Oct 24, 2026

Identifiers

CVE-2018-14655

GHSA-458h-wv48-fq75

References

Advisoryaccess.redhat.com · RHSA 2018:3592 Advisoryaccess.redhat.com · RHSA 2018:3593 Advisoryaccess.redhat.com · RHSA 2018:3595 Advisorynvd.nist.gov · CVE 2018 14655 Reportbugzilla.redhat.com · show bug.cgi Packagegithub.com · keycloak

Related vulnerabilities

This CVE is medium severity; 7 of 8 other CVEs affecting keycloak-parent are rated as high or higher (top: critical).

CVE-2026-1518CVE-2026-0707CVE-2022-4137CVE-2022-3916CVE-2022-3782CVE-2022-2256CVE-2022-2668CVE-2021-3513

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026