CVE-2021-37700
GitHub Paste-Markdown Cross-Site Scripting Vulnerability
Description
@github/paste-markdown is an npm package for pasting markdown objects. A self Cross-Site Scripting vulnerability exists in the @github/paste-markdown before version 0.3.4. If the clipboard data contains the string `<table>`, a **div** is dynamically created, and the clipboard content is copied into its **innerHTML** property without any sanitization, resulting in improper execution of JavaScript in the browser of the victim (the user who pasted the code). Users directed to copy text from a malicious website and paste it into pages that utilize this library are affected. This is fixed in version 0.3.4. Refer the to the referenced GitHub Advisory for more details including an example exploit.
INFO
Published Date :
Aug. 12, 2021, 9:15 p.m.
Last Modified :
Nov. 21, 2024, 6:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
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-2021-37700.
| URL | Resource |
|---|---|
| https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30 | Patch Third Party Advisory |
| https://github.com/github/paste-markdown/releases/tag/v0.3.4 | Release Notes Third Party Advisory |
| https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9 | Exploit Third Party Advisory |
| https://www.npmjs.com/package/%40github/paste-markdown | |
| https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30 | Patch Third Party Advisory |
| https://github.com/github/paste-markdown/releases/tag/v0.3.4 | Release Notes Third Party Advisory |
| https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9 | Exploit Third Party Advisory |
| https://www.npmjs.com/package/%40github/paste-markdown |
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-2021-37700 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-37700 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.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30 Added Reference https://github.com/github/paste-markdown/releases/tag/v0.3.4 Added Reference https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9 Added Reference https://www.npmjs.com/package/%40github/paste-markdown -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://www.npmjs.com/package/%40github/paste-markdown [No types assigned] Removed Reference GitHub, Inc. https://www.npmjs.com/package/@github/paste-markdown -
Initial Analysis by [email protected]
Aug. 23, 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/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30 No Types Assigned https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30 Patch, Third Party Advisory Changed Reference Type https://github.com/github/paste-markdown/releases/tag/v0.3.4 No Types Assigned https://github.com/github/paste-markdown/releases/tag/v0.3.4 Release Notes, Third Party Advisory Changed Reference Type https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9 No Types Assigned https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9 Exploit, Third Party Advisory Changed Reference Type https://www.npmjs.com/package/@github/paste-markdown No Types Assigned https://www.npmjs.com/package/@github/paste-markdown Product, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:paste-markdown_project:paste-markdown:*:*:*:*:*:node.js:*:* versions up to (excluding) 0.3.4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-37700 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-2021-37700
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.67 }} -0.29%
score
0.69001
percentile