CVE Vulnerability

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.1 /10

CVSS v3.0 : MEDIUM

V3 Legend

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

References
Link Resource
https://github.com/remarkjs/remark-html/releases/tag/14.0.1 Patch Release Notes
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
Configurations

Configuration 1

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

Published : 2021-09-07 07:15

Updated : 2021-09-14 04:11

NVD link : CVE-2021-39199

Mitre link : CVE-2021-39199

Products Affected
No products.
CWE
CWE-79