VULNERABILITY INTELLIGENCE

CVE-2021-20293

CVSS score6.1 MEDIUM

EPSS probability0.86%

CISA KEVNot currently listed

Published2021-06-10

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

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.

Weakness classification

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

Primary references

secalert@redhat.com — Issue Tracking, Vendor Advisory
secalert@redhat.com — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory