CVE-2021-32796: xmldom is an open source pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer

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MEDIUM 6.5REMOTEUPGRADE

CVE-2021-32796 is a medium-severity flaw (CVSS 6.5) affecting xmldom. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

xmldom is an open source pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. xmldom versions 0.6.0 and older do not correctly escape special characters when serializing elements removed from their ancestor. This may lead to unexpected syntactic changes during XML processing in some downstream applications. This issue has been resolved in version 0.7.0. As a workaround downstream applications can validate

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-116, CWE-91
Published	2021-07-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: xmldom project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-27 22:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

xmldom project xmldom UPGRADE

Affected: < 0.7.0

Fixed in: 0.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls xmldom

2. UPGRADE to 0.7.0

npm install xmldom@">=0.7.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-32796?

xmldom: upgrade to 0.7.0. Exact commands for each OS are on this page.

Is CVE-2021-32796 being exploited?

CVE-2021-32796 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-32796 affect?

CVE-2021-32796 affects xmldom. Severity is medium (CVSS 6.5). xmldom is an open source pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. xmldom versions 0.6.0 and older do not correctly escape special characters when serializing elements removed from their a

How urgent is CVE-2021-32796?

Priority 46/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-37616 CRITICAL 9.8 UPGRADE MITIGATE A prototype pollution vulnerability exists in the function copy in dom.js in the xmldom (published as @xmldom/
CVE-2021-21366 MEDIUM 4.3 UPGRADE MITIGATE xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module

References

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