What is the CVSS score of CVE-2020-26870?

CVE-2020-26870 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 4.9%.

Is there a public PoC exploit available for CVE-2020-26870?

Yes, a public proof-of-concept exploit is available for CVE-2020-26870. Prioritise patching immediately. EPSS: 4.9%.

Is there a patch available for CVE-2020-26870?

Yes, a patch is available for CVE-2020-26870. Update the affected software to the latest version immediately.

Dompurify CVE-2020-26870

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2020-10-07 cve@mitre.org

XSS Dompurify Debian Linux Visual Studio 2017 Visual Studio 2019 Application Express

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Oct 07, 2020 - 16:15 nvd

MEDIUM 6.1

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

32 npm packages depend on dompurify (13 direct, 19 indirect)

Ecosystem-wide dependent count for version 2.0.17.

DescriptionNVD

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.

AnalysisAI

Cure53 DOMPurify before 2.0.17 allows mutation XSS. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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 products include: Cure53 Dompurify, Debian Debian Linux, Microsoft Visual Studio 2017, Microsoft Visual Studio 2019, Oracle Application Express. Version information: before 2.0.17.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.