CVE-2021-20293

RESTEasy: PathParam in RESTEasy can lead to a reflected XSS attack

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A reflected Cross-Site Scripting (XSS) flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final, where it did not properly handle URL encoding when calling @javax.ws.rs.PathParam without any @Produces MediaType. This flaw allows an attacker to launch a reflected XSS attack. The highest threat from this vulnerability is to data confidentiality and integrity.

Se ha encontrado un fallo de tipo Cross-Site Scripting (XSS) reflejado en RESTEasy en todas las versiones de RESTEasy hasta la 4.6.0.Final, donde no se manejaba apropiadamente la codificación de la URL cuando se llamaba al parámetro @javax.ws.rs.PathParam sin ningún parámetro @Produces MediaType. Este fallo permite a un atacante iniciar un ataque de tipo XSS reflejado. La mayor amenaza de esta vulnerabilidad es para la confidencialidad e integridad de los datos

A micro version update is now available for Red Hat Camel K that includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include cross site scripting, denial of service, information leakage, and server-side request forgery vulnerabilities.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2021-06-10 CVE Published
2024-08-03 CVE Updated
2025-03-30 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 (3)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210727-0005	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1942819	2021-09-20
https://access.redhat.com/security/cve/CVE-2021-20293	2022-03-23

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"		Resteasy Search vendor "Redhat" for product "Resteasy"				<= 4.6.0 Search vendor "Redhat" for product "Resteasy" and version " <= 4.6.0"		-		Affected
Netapp Search vendor "Netapp"		Oncommand Insight Search vendor "Netapp" for product "Oncommand Insight"				-		-		Affected