Medium
Security advisory
bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-3874
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:52 UTC · Revision 1
Source evidence
bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
osv:CVE-2021-3874
Complete source record
{
"id": "219200609dc3979fd4a9e19f8f5bd9d343ca1fe37214c6b990c3b43077355c98",
"url": "https://osv.dev/vulnerability/CVE-2021-3874",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-3874",
"summary": "bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
"evidence": "osv:CVE-2021-3874",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-3874",
"aliases": [
"CVE-2021-3874"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/bookstackapp/bookstack",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "dab170a6feb66986abf02b9de34c75aaf48a5373"
},
{
"fixed": "7224fbcc89f00f2b71644e36bb1b1d96addd1d5a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "21.08.5"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "7224fbcc89f00f2b71644e36bb1b1d96addd1d5a"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v21.08.4",
"v21.08.3",
"v21.08.2",
"v21.08.1",
"v21.08",
"v21.05.4",
"v21.05.3",
"v21.05.2",
"v21.05.1",
"v21.05",
"v21.04.6",
"v21.04.5",
"v21.04.4",
"v21.04.3",
"v21.04.2",
"v21.04.1",
"v21.04",
"v0.31.8",
"v0.31.7",
"v0.31.6",
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"v0.28.0",
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"v0.27",
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"v0.25.3",
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"v0.24.1",
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"v0.23.1",
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"v0.22.0",
"v0.21.0",
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"v0.20.2",
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"v0.17.4",
"v0.17.3",
"v0.17.2",
"v0.17.1",
"v0.17.0",
"v0.16.3",
"v0.16.2",
"v0.16.1",
"v0.16.0",
"v0.15.3",
"v0.15.2",
"v0.15.1",
"v0.15.0",
"v0.14.3",
"v0.14.2",
"v0.14.1",
"v0.14.0",
"v0.13.1",
"v0.13.0",
"v0.12.2",
"v0.12.1",
"v0.12.0",
"v0.11.2",
"v0.11.1",
"v0.11.0",
"v0.10.0",
"v0.9.3",
"v0.9.2",
"v0.9.1",
"v0.9.0",
"v0.8.2",
"v0.8.1",
"v0.8.0",
"v0.7.6",
"v0.7.5",
"v0.7.4",
"v0.7.3",
"0.7.2",
"v.0.7.1",
"v0.7.0",
"v0.6.3",
"v0.6.2",
"v0.6.1",
"v0.6.0",
"v0.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3874.json"
}
}
],
"modified": "2026-10-20T10:54:52.182149375Z",
"provider": "osv",
"references": [
"https://github.com/bookstackapp/bookstack/commit/7224fbcc89f00f2b71644e36bb1b1d96addd1d5a",
"https://huntr.dev/bounties/ac268a17-72b5-446f-a09a-9945ef58607a"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-3874",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386306,
"published_at": "2021-10-15T14:15:07.757+00:00"
}