CVE-2018-14655

keycloak: XSS-Vulnerability with response_mode=form_post

Severity Score

5.4

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha descubierto un error en Keycloak 3.4.3.Final, 4.0.0.Beta2 y 4.3.0.Final. Al emplear "response_mode=form_post", es posible inyectar código JavaScript arbitrario mediante el parámetro "state" en la URL de autenticación. Esto permite un ataque Cross-Site Scripting (XSS) al iniciar sesión exitosamente.

Red Hat Single Sign-On 7.2 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. This release of Red Hat Single Sign-On 7.2.5 serves as a replacement for Red Hat Single Sign-On 7.2.4, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include a cross site scripting vulnerability.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-07-27 CVE Reserved
2018-11-13 CVE Published
2024-08-05 CVE Updated
2025-05-06 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (6)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:3592	2019-10-09
https://access.redhat.com/errata/RHSA-2018:3593	2019-10-09
https://access.redhat.com/errata/RHSA-2018:3595	2019-10-09
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655	2019-10-09
https://access.redhat.com/security/cve/CVE-2018-14655	2018-11-13
https://bugzilla.redhat.com/show_bug.cgi?id=1625396	2018-11-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"	Single Sign-on Search vendor "Redhat" for product "Single Sign-on"	7.2 Search vendor "Redhat" for product "Single Sign-on" and version "7.2"	-	Affected	in	Redhat Search vendor "Redhat"	Linux Search vendor "Redhat" for product "Linux"	7.0 Search vendor "Redhat" for product "Linux" and version "7.0"	-	Safe
Redhat Search vendor "Redhat"	Single Sign-on Search vendor "Redhat" for product "Single Sign-on"	7.2 Search vendor "Redhat" for product "Single Sign-on" and version "7.2"	-	Affected	in	Redhat Search vendor "Redhat"	Linux Search vendor "Redhat" for product "Linux"	6.0 Search vendor "Redhat" for product "Linux" and version "6.0"	-	Safe
Redhat Search vendor "Redhat"		Keycloak Search vendor "Redhat" for product "Keycloak"				3.4.3 Search vendor "Redhat" for product "Keycloak" and version "3.4.3"		-		Affected
Redhat Search vendor "Redhat"		Keycloak Search vendor "Redhat" for product "Keycloak"				4.0.0 Search vendor "Redhat" for product "Keycloak" and version "4.0.0"		beta2		Affected
Redhat Search vendor "Redhat"		Keycloak Search vendor "Redhat" for product "Keycloak"				4.3.0 Search vendor "Redhat" for product "Keycloak" and version "4.3.0"		-		Affected
Redhat Search vendor "Redhat"		Single Sign-on Search vendor "Redhat" for product "Single Sign-on"				-		text-only		Affected