CVE-2021-39199
Remark-HTML Unsanitized User Input permits XSS Attacks
Description
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.
INFO
Published Date :
Sept. 7, 2021, 7:15 p.m.
Last Modified :
Nov. 21, 2024, 6:18 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.8
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39199.
| URL | Resource |
|---|---|
| https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1 | Patch Third Party Advisory |
| https://github.com/remarkjs/remark-html/releases/tag/14.0.1 | Patch Release Notes Third Party Advisory |
| https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m | Patch Third Party Advisory |
| https://www.npmjs.com/package/remark-html | Product Third Party Advisory |
| https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1 | Patch Third Party Advisory |
| https://github.com/remarkjs/remark-html/releases/tag/14.0.1 | Patch Release Notes Third Party Advisory |
| https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m | Patch Third Party Advisory |
| https://www.npmjs.com/package/remark-html | Product Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39199 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39199 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1 Added Reference https://github.com/remarkjs/remark-html/releases/tag/14.0.1 Added Reference https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m Added Reference https://www.npmjs.com/package/remark-html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1 No Types Assigned https://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1 Patch, Third Party Advisory Changed Reference Type https://github.com/remarkjs/remark-html/releases/tag/14.0.1 No Types Assigned https://github.com/remarkjs/remark-html/releases/tag/14.0.1 Patch, Release Notes, Third Party Advisory Changed Reference Type https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m No Types Assigned https://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m Patch, Third Party Advisory Changed Reference Type https://www.npmjs.com/package/remark-html No Types Assigned https://www.npmjs.com/package/remark-html Product, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:* versions up to (excluding) 13.0.2 *cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:* versions from (including) 14.0.0 up to (excluding) 14.0.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39199 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39199
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.33 }} -0.14%
score
0.52741
percentile