symfony — security advisory
An open redirect was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9 and 4.2.x before 4.2.1. By using backslashes in the `_failure_path` input field of login forms, an attacker can work around the redirection target restrictions and effectively redirect the user to any domain after login.
- Products
- symfony
- Affected versions
- Not specified
- Fixed versions
- 3.4.20+dfsg-1
- CVEs
- CVE-2018-19790
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:11 UTC · Revision 1
Source evidence
An open redirect was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9 and 4.2.x before 4.2.1. By using backslashes in the `_failure_path` input field of login forms, an attacker can work around the redirection target restrictions and effectively redirect the user to any domain after login.
osv:DEBIAN-CVE-2018-19790
symfony
Fixed versions: 3.4.20+dfsg-1
symfony
Fixed versions: 3.4.20+dfsg-1
symfony
Fixed versions: 3.4.20+dfsg-1
Complete source record
{
"id": "f10de5d9ba76b540cc5a39c7724f5ed4bba1d6384c687d9971c28c22f722765d",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-19790",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-19790",
"summary": "An open redirect was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9 and 4.2.x before 4.2.1. By using backslashes in the `_failure_path` input field of login forms, an attacker can work around the redirection target restrictions and effectively redirect the user to any domain after login.",
"evidence": "osv:DEBIAN-CVE-2018-19790",
"products": [
{
"name": {
"value": "symfony",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.20+dfsg-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "symfony",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.20+dfsg-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "symfony",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.20+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2018-19790",
"aliases": [
"DEBIAN-CVE-2018-19790"
],
"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": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.20+dfsg-1"
}
]
}
],
"package": {
"name": "symfony",
"purl": "pkg:deb/debian/symfony?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19790.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.20+dfsg-1"
}
]
}
],
"package": {
"name": "symfony",
"purl": "pkg:deb/debian/symfony?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19790.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.20+dfsg-1"
}
]
}
],
"package": {
"name": "symfony",
"purl": "pkg:deb/debian/symfony?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19790.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:04.125390823Z",
"provider": "osv",
"upstream": [
"CVE-2018-19790"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-19790"
]
},
"related_cves": [
{
"value": "CVE-2018-19790",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 420291,
"published_at": "2018-12-18T22:29:05.04+00:00"
}