Cross-site scripting in DOMPurify - CVE-2020-26870

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Main Vulnerability Database Vulnerabilities #VU49403

Cross-site scripting in DOMPurify - CVE-2020-26870

Published: October 7, 2020 / Updated: April 18, 2023


Vulnerability identifier: #VU49403
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2020-26870
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in Cure53 DOMPurify. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


Affected software

DOMPurify
Swagger UI
Web Help Desk
Visual Studio
Oracle Retail Customer Management and Segmentation Foundation
Database Performance Analyzer
Oracle Application Express

How to mitigate CVE-2020-26870

Install updates from vendor's website.

DOMPurify - update to 2.0.17
Swagger UI - update to 3.37.0
Web Help Desk - update to 12.8.4
Database Performance Analyzer - update to 2023.2
Oracle Application Express - update to 21.1.0.00.01

External References

Related Security Bulletins