Description

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.

Remediation

References

CVE-2020-26870

Related Vulnerabilities

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Drupal Improper Input Validation Vulnerability (CVE-2017-6921)

Atlassian Jira Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2019-20098)

Severity

Medium

Classification

CVE-2020-26870 CWE-707 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Tags

Missing Update Known Vulnerabilities