CVE-2021-21366: Interpretation Conflict

March 12, 2021 (updated February 28, 2023)

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.

References

github.com/xmldom/xmldom/commit/d4201b9dfbf760049f457f9f08a3888d48835135
github.com/xmldom/xmldom/releases/tag/0.5.0
github.com/xmldom/xmldom/security/advisories/GHSA-h6q6-9hqw-rwfv
nvd.nist.gov/vuln/detail/CVE-2021-21366
www.npmjs.com/package/xmldom

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