Medium
Security advisory
Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-11627
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:25 UTC · Revision 1
Source evidence
Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.
osv:CVE-2018-11627
Complete source record
{
"id": "4aac7828ad57082f5afd2adf409f91db7827154076c4982bc49af03c6d28c27b",
"url": "https://osv.dev/vulnerability/CVE-2018-11627",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-11627",
"summary": "Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.",
"evidence": "osv:CVE-2018-11627",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-11627",
"aliases": [
"CVE-2018-11627",
"GHSA-mq35-wqvf-r23c"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/sinatra/sinatra",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c8910e9a7f9537e397f34b9e71e15757ccfbbae3"
},
{
"fixed": "12786867d6faaceaec62c7c2cb5b0e2dc074d71a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:sinatrarb:sinatra:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.0.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "12786867d6faaceaec62c7c2cb5b0e2dc074d71a"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v2.0.1",
"v2.0.1.rc1",
"v2.0.0",
"v2.0.0.rc6",
"v2.0.0.rc5",
"2.0.0.rc5",
"v2.0.0.rc4",
"2.0.0.rc4",
"v2.0.0.rc3",
"2.0.0.rc3",
"v2.0.0.rc2",
"v2.0.0.beta2",
"v2.0.0.rc1",
"v1.4.6",
"v1.4.5",
"v1.4.4",
"v1.4.3",
"1.4.3",
"v1.4.2",
"1.4.2",
"v1.4.1",
"1.4.1",
"v1.4.0",
"1.4.0",
"v1.3.2",
"1.3.2",
"v1.3.1",
"1.3.1",
"v1.3.0",
"1.3.0",
"v1.2.1",
"1.2.1",
"v1.2.0",
"1.2.0",
"1.2.0.d",
"1.2.0.c",
"1.2.0.b",
"1.2.0.a",
"v1.1.0",
"1.1.0",
"1.1.b",
"1.1.a",
"v1.0.0",
"semver",
"1.0",
"1.0.b",
"1.0.a",
"0.9.2",
"0.9.1.1",
"0.9.1",
"0.9.0.2",
"0.9.0.1",
"0.3.3",
"0.3.2",
"0.3.1",
"0.3.0",
"0.2.2",
"0.2.0",
"0.1.7",
"0.1.6",
"0.1.5",
"0.1.0",
"0.0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-11627.json"
}
}
],
"modified": "2026-10-24T10:47:25.042480783Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2019:0212",
"https://access.redhat.com/errata/RHSA-2019:0315",
"https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a",
"https://github.com/sinatra/sinatra/issues/1428"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:sinatrarb:sinatra:*:*:*:*:*:*:*:*"
],
"vendor_product": "sinatrarb:sinatra",
"extracted_events": [
{
"range": [
{
"fixed": "2.0.2"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*",
"cpe:2.3:a:redhat:cloudforms:4.7:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:cloudforms",
"extracted_events": [
{
"range": [
{
"introduced": "4.6"
},
{
"last_affected": "4.6"
},
{
"introduced": "4.7"
},
{
"last_affected": "4.7"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-11627",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 441209,
"published_at": "2018-05-31T19:29:00.203+00:00"
}