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Rewterz Threat Advisory – CVE-2021-21366 – Node.js xmldom module security bypass

Severity

Medium

Analysis Summary

CVE-2021-21366

Node.js xmldom module could allow a remote attacker to bypass security restrictions, caused by improper preserve of system identifiers, FPIs or namespaces during XML processing. By repeatedly parsing and serializing specially-crafted documents, an attacker could exploit this vulnerability to cause unexpected syntactic changes in some downstream applications.

Impact

Bypass Security

Affected Vendors

NodeJs

Affected Products

Node.js xmldom 0.4.0

Remediation

Upgrade to the latest version of xmldom (0.5.0 or later).