CVE-2021-21366 Misinterpretation of malicious XML input

2021-03-1200:00:00

CWE-436

CWE-115

GitHub_M

www.cve.org

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

6.6 Medium

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.7%

JSON

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.

CNA Affected

[
  {
    "vendor": "xmldom",
    "product": "xmldom",
    "versions": [
      {
        "version": "< 0.5.0",
        "status": "affected"
      }
    ]
  }
]