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.
Published 2021-03-12 17:15:13
Updated 2023-02-28 19:24:50
Source GitHub, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-21366

Exploit prediction scoring system (EPSS) score for CVE-2021-21366

0.15%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21366

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
NIST
4.3
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.8
1.4
NIST
4.3
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.8
1.4
GitHub, Inc.

CWE ids for CVE-2021-21366

  • The product misinterprets an input, whether from an attacker or another product, in a security-relevant fashion.
    Assigned by: security-advisories@github.com (Primary)
  • Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.
    Assigned by:
    • nvd@nist.gov (Secondary)
    • security-advisories@github.com (Primary)

References for CVE-2021-21366

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