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Linux Distros Unpatched Vulnerability : CVE-2021-20293

medium Nessus Plugin ID 223684

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - 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. (CVE-2021-20293)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2021-20293

https://ubuntu.com/security/CVE-2021-20293

Plugin Details

Severity: Medium

ID: 223684

File Name: unpatched_CVE_2021_20293.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 3/4/2025

Updated: 8/20/2025

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.0

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2021-20293

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:resteasy-base-atom-provider, p-cpe:/a:redhat:enterprise_linux:resteasy-base-jaxrs, p-cpe:/a:redhat:enterprise_linux:resteasy-base-jaxrs-api, p-cpe:/a:canonical:ubuntu_linux:resteasy, p-cpe:/a:centos:centos:resteasy-base-javadoc, p-cpe:/a:redhat:enterprise_linux:resteasy-base, p-cpe:/a:redhat:enterprise_linux:resteasy-base-atom-provider, p-cpe:/a:centos:centos:resteasy-base-jaxb-provider, p-cpe:/a:redhat:enterprise_linux:resteasy-base-jackson-provider, p-cpe:/a:redhat:enterprise_linux:resteasy-base-jaxrs-all, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:resteasy-base-tjws, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:resteasy-base-providers-pom, p-cpe:/a:redhat:enterprise_linux:resteasy, p-cpe:/a:canonical:ubuntu_linux:resteasy3.0, p-cpe:/a:centos:centos:resteasy-base-jaxrs-all, p-cpe:/a:redhat:enterprise_linux:resteasy-base-javadoc, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:resteasy-base-client, p-cpe:/a:centos:centos:resteasy-base, p-cpe:/a:centos:centos:resteasy-base-jaxrs-api, p-cpe:/a:centos:centos:resteasy-base-jaxrs, p-cpe:/a:centos:centos:resteasy-base-tjws, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:resteasy-base-client, p-cpe:/a:redhat:enterprise_linux:resteasy-base-resteasy-pom, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:resteasy-base-resteasy-pom, p-cpe:/a:redhat:enterprise_linux:resteasy-base-jaxb-provider, p-cpe:/a:redhat:enterprise_linux:resteasy-base-providers-pom, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:centos:centos:resteasy, p-cpe:/a:redhat:enterprise_linux:resteasy-base-jettison-provider, p-cpe:/a:centos:centos:resteasy-base-jettison-provider, p-cpe:/a:centos:centos:resteasy-base-jackson-provider

Required KB Items: Host/OS/identifier, Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/10/2021

Reference Information

CVE: CVE-2021-20293