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CVE-2021-21366 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CNA: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/xmldom/xmldom/commit/d4201b9dfbf760049f457f9f08a3888d48835135	CVE	Patch
https://github.com/xmldom/xmldom/releases/tag/0.5.0	CVE	Release Notes
https://github.com/xmldom/xmldom/security/advisories/GHSA-h6q6-9hqw-rwfv	CVE	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00000.html	CVE	Mailing ListThird Party Advisory
https://www.npmjs.com/package/xmldom	CVE	Product
https://github.com/xmldom/xmldom/commit/d4201b9dfbf760049f457f9f08a3888d48835135	[email protected]	Patch
https://github.com/xmldom/xmldom/releases/tag/0.5.0	[email protected]	Release Notes
https://github.com/xmldom/xmldom/security/advisories/GHSA-h6q6-9hqw-rwfv	[email protected]	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00000.html	[email protected]	Mailing ListThird Party Advisory
https://www.npmjs.com/package/xmldom	[email protected]	Product

see all 10 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-436	Interpretation Conflict	[email protected]
CWE-115	Misinterpretation of Input	[email protected]
CWE-436	Interpretation Conflict	[email protected]

Affected Products

Product	Versions
xmldom project xmldom	< 0.5.0
CPE cpe:2.3:a:xmldom_project:xmldom::::::node.js::* Remediation No remediation found in references.
debian debian linux	10.0
CPE cpe:2.3:o:debian:debian_linux:10.0:::::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 28, 2023	Modified Analysis	[email protected]
Jan 1, 2023	CVE Modified	[email protected]
Mar 22, 2021	Initial Analysis	[email protected]