CVE-2020-26870

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Cure53 DOMPurify versiones anteriores a 2.0.17, permite una mutación de XSS. Esto ocurre porque un viaje de ida y vuelta de análisis serializado no necesariamente devuelve el árbol DOM original, y un espacio de nombres puede cambiar de HTML a MathML, como es demostrado al anidar los elementos FORM

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-07 CVE Reserved
2020-10-07 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-09-13 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (6)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html	Mailing List

URL	Date	SRC
https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass	2024-08-04

URL	Date	SRC
https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d	2022-04-27
https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17	2022-04-27
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870	2022-04-27
https://www.oracle.com//security-alerts/cpujul2021.html	2022-04-27

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cure53 Search vendor "Cure53"		Dompurify Search vendor "Cure53" for product "Dompurify"				< 2.0.17 Search vendor "Cure53" for product "Dompurify" and version " < 2.0.17"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2017 Search vendor "Microsoft" for product "Visual Studio 2017"				15.9 Search vendor "Microsoft" for product "Visual Studio 2017" and version "15.9"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2019 Search vendor "Microsoft" for product "Visual Studio 2019"				16.0 Search vendor "Microsoft" for product "Visual Studio 2019" and version "16.0"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2019 Search vendor "Microsoft" for product "Visual Studio 2019"				16.4 Search vendor "Microsoft" for product "Visual Studio 2019" and version "16.4"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2019 Search vendor "Microsoft" for product "Visual Studio 2019"				16.7 Search vendor "Microsoft" for product "Visual Studio 2019" and version "16.7"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2019 Search vendor "Microsoft" for product "Visual Studio 2019"				16.8 Search vendor "Microsoft" for product "Visual Studio 2019" and version "16.8"		-		Affected
Oracle Search vendor "Oracle"		Application Express Search vendor "Oracle" for product "Application Express"				< 21.1.0.00.01 Search vendor "Oracle" for product "Application Express" and version " < 21.1.0.00.01"		-		Affected