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Medium

Cross-site Scripting in dompurify

  • Disclosed: 18.12.2020
  • Updated: 11.10.2026 10:22

Cure53 DOMPurify before 2.0.17 allows mutation XSS. This occurs because a serialize-parse roundtrip does not necessarily return the original DOM tree, and a namespace can change from HTML to MathML, as demonstrated by nesting of FORM elements.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package dompurify < 2.0.17 2.0.17

References

CVSS score 6.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
Platform
npm
Package
dompurify
Disclosed
18.12.2020
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-63q7-h895-m982 - CC BY 4.0

Vulnerability history: dompurify

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (30) in the archive
Total entries
30
First → latest
08.2020 10.2026
Without a fix
1
Exploited in attacks
0

Severity breakdown

  • Critical 2
  • High 3
  • Medium 19
  • Low 6

Disclosures per year

Severity:
  1. DOMPurify XSS via selectedcontent re-clone
    High · 8.2 CVE-2026-47423 >= 3.4.4, < 3.4.5 3.4.5
  2. DOMPurify vulnerable to tampering by prototype polution
    Critical · 9.1 CVE-2024-48910 < 2.4.2 2.4.2
  3. DOMpurify has a nesting-based mXSS
    High · 10.0 CVE-2024-47875 < 2.5.0, >= 3.0.0, < 3.1.3 2.5.0, 3.1.3
  4. DOMPurify allows tampering by prototype pollution
    High · 7.0 CVE-2024-45801 < 2.5.4, >= 3.0.0, < 3.1.3 2.5.4, 3.1.3
  5. Cross-site Scripting in dompurify this entry
    Medium · 6.1 CVE-2020-26870 < 2.0.17 2.0.17
  6. Cross-Site Scripting in dompurify
    Critical ghsa-mjjq-c88q-qhr6 < 2.0.7 2.0.7

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