CVE-2021-39199

remark-html is an open source nodejs library which compiles Markdown to HTML. In affected versions the documentation of remark-html has mentioned that it was safe by default. In practice the default was never safe and had to be opted into. That is, user input was not sanitized. This means arbitrary HTML can be passed through leading to potential XSS attacks. The problem has been patched in 13.0.2 and 14.0.1: `remark-html` is now safe by default, and the implementation matches the documentation. On older affected versions, pass `sanitize: true` if you cannot update.

CVSS v3.0 6.1 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.1^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/remarkjs/remark-html/releases/tag/14.0.1	Patch Release Notes Third Party Advisory
https://www.npmjs.com/package/remark-html	Product Third Party Advisory
https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m	Patch Third Party Advisory
https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1	Patch Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:remark:remark-html::::::node.js::*
	cpe:2.3:a:remark:remark-html::::::node.js::*

Information

Published : 2021-09-07 12:15

Updated : 2021-09-14 09:11

NVD link : CVE-2021-39199

Mitre link : CVE-2021-39199

JSON object : View

CWE

CWE-79

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

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Products Affected

remark

remark-html

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