vulnerability

Ubuntu: USN-6102-1 (CVE-2021-21366): xmldom vulnerabilities

Try Surface Command

Back to search

Severity

CVSS

(AV:N/AC:M/Au:N/C:N/I:P/A:N)

Published

Mar 12, 2021

Added

May 25, 2023

Modified

Mar 27, 2026

Description

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. xmldom versions 0.4.0 and older do not correctly preserve system identifiers, FPIs or namespaces when repeatedly parsing and serializing maliciously crafted documents. This may lead to unexpected syntactic changes during XML processing in some downstream applications. This is fixed in version 0.5.0. As a workaround downstream applications can validate the input and reject the maliciously crafted documents.

Solution

ubuntu-upgrade-node-xmldom

References

CVE-2021-21366
https://attackerkb.com/topics/CVE-2021-21366
CWE-115
CWE-436
EUVD-EUVD-2021-0663
UBUNTU-USN-6102-1
https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-0663

Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.

Get report