Medium
Security advisory
The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-34364
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:50 UTC · Revision 1
Source evidence
The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.
osv:CVE-2021-34364
Complete source record
{
"id": "6393c0187c5433c07e4a26501dd1c50b4bbbee291a750f2b110df3844a212c5a",
"url": "https://osv.dev/vulnerability/CVE-2021-34364",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-34364",
"summary": "The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.",
"evidence": "osv:CVE-2021-34364",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-34364",
"aliases": [
"CVE-2021-34364"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/refined-github/refined-github",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "6f27970fe351f24086298504dd9d8a6490a8a64a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:refined-github_project:refined-github:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "21.6.8"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "6f27970fe351f24086298504dd9d8a6490a8a64a"
}
],
"source": "REFERENCES_TAG",
"original_tag": "21.6.8"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-34364.json"
}
}
],
"modified": "2026-10-20T10:54:48.290443990Z",
"provider": "osv",
"references": [
"https://github.com/sindresorhus/refined-github/releases/tag/21.6.8",
"https://vuln.ryotak.me/advisories/47"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-34364",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386169,
"published_at": "2021-06-09T11:15:07.583+00:00"
}