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CVE
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CVE-2020-26870Date: (C)2020-10-08   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 6.1CVSS Score : 4.3
Exploit Score: 2.8Exploit Score: 8.6
Impact Score: 2.7Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: MEDIUM
Privileges Required: NONEAuthentication: NONE
User Interaction: REQUIREDConfidentiality: NONE
Scope: CHANGEDIntegrity: PARTIAL
Confidentiality: LOWAvailability: NONE
Integrity: LOW 
Availability: NONE 
  
Reference:
N/A
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870
https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html
https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d
https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17
https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/

CPE    2
cpe:/o:debian:debian_linux:9.0
cpe:/a:microsoft:visual_studio_2019:16.0
CWE    1
CWE-79
OVAL    1
oval:org.secpod.oval:def:68173

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