GSD-2021-37700
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
@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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-37700",
"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 `\u003ctable\u003e`, 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.",
"id": "GSD-2021-37700"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
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],
"details": "@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 `\u003ctable\u003e`, 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.",
"id": "GSD-2021-37700",
"modified": "2023-12-13T01:23:10.175373Z",
"schema_version": "1.4.0"
}
},
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"ID": "CVE-2021-37700",
"STATE": "PUBLIC",
"TITLE": "Clipboard-based DOM-XSS"
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"affects": {
"vendor": {
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"product": {
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"product_name": "paste-markdown",
"version": {
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"value": "@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 `\u003ctable\u003e`, 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."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"version": "3.1"
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"value": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
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"name": "https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9",
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"url": "https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9"
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{
"name": "https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30",
"refsource": "MISC",
"url": "https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30"
},
{
"name": "https://github.com/github/paste-markdown/releases/tag/v0.3.4",
"refsource": "MISC",
"url": "https://github.com/github/paste-markdown/releases/tag/v0.3.4"
},
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"name": "https://www.npmjs.com/package/@github/paste-markdown",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@github/paste-markdown"
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"source": {
"advisory": "GHSA-gpfj-4j6g-c4w9",
"discovery": "UNKNOWN"
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"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c0.3.4",
"affected_versions": "All versions before 0.3.4",
"cvss_v2": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"cwe_ids": [
"CWE-1035",
"CWE-937"
],
"date": "2021-08-23",
"description": "@github/paste-markdown is an npm package for pasting markdown objects.Refer the to the referenced GitHub Advisory for more details including an example exploit.",
"fixed_versions": [
"0.3.4"
],
"identifier": "CVE-2021-37700",
"identifiers": [
"CVE-2021-37700",
"GHSA-gpfj-4j6g-c4w9"
],
"not_impacted": "All versions starting from 0.3.4",
"package_slug": "npm/@github/paste-markdown",
"pubdate": "2021-08-12",
"solution": "Upgrade to version 0.3.4 or above.",
"title": "Cross-site Scripting",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-37700"
],
"uuid": "a212974c-a76c-410a-86fc-f6d037f7243f"
}
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"versionEndExcluding": "0.3.4",
"vulnerable": true
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"description": {
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"value": "@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 `\u003ctable\u003e`, 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."
}
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"name": "https://github.com/github/paste-markdown/releases/tag/v0.3.4",
"refsource": "MISC",
"tags": [
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"url": "https://github.com/github/paste-markdown/releases/tag/v0.3.4"
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"url": "https://github.com/github/paste-markdown/security/advisories/GHSA-gpfj-4j6g-c4w9"
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"url": "https://github.com/github/paste-markdown/commit/32b7ea3f29ae8f256f9d19768387be42678ddf30"
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"impact": {
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"cvssV2": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
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"exploitabilityScore": 8.6,
"impactScore": 2.9,
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"severity": "MEDIUM",
"userInteractionRequired": true
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"attackVector": "NETWORK",
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"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
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"exploitabilityScore": 2.8,
"impactScore": 2.7
}
},
"lastModifiedDate": "2021-08-23T14:29Z",
"publishedDate": "2021-08-12T21:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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