Critical
Security advisory
Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. To workaround the issue without updating, requests with a path starting /webhooks/aws path could be blocked at an upstream proxy.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-41163
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:20 UTC · Revision 1
Source evidence
Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. To workaround the issue without updating, requests with a path starting /webhooks/aws path could be blocked at an upstream proxy.
osv:CVE-2021-41163
Complete source record
{
"id": "3d39df9377ecd7700864ff3ce934214ecfb569744801a3fb3ef158ffb293cf81",
"url": "https://osv.dev/vulnerability/CVE-2021-41163",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-41163",
"summary": "Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. To workaround the issue without updating, requests with a path starting /webhooks/aws path could be blocked at an upstream proxy.",
"evidence": "osv:CVE-2021-41163",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-41163",
"aliases": [
"BIT-discourse-2021-41163",
"CVE-2021-41163",
"GHSA-jcjx-pvpc-qgwq"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "a1dcf3a50cdc69a33e7174eb23e2415fc32de79f"
},
{
"introduced": "05c1d3c9cdd7f3e365bedc397dd92a7e7bc2c40f"
},
{
"last_affected": "f0d2b0f2f08fc201031c85e1669dbd82dcd9b543"
},
{
"fixed": "fa3c46cf079d28b086fe1025349bb00223a5d5e9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.7.9"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta1"
},
{
"last_affected": "2.8.0-beta1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta2"
},
{
"last_affected": "2.8.0-beta2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta3"
},
{
"last_affected": "2.8.0-beta3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta4"
},
{
"last_affected": "2.8.0-beta4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta5"
},
{
"last_affected": "2.8.0-beta5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta6"
},
{
"last_affected": "2.8.0-beta6"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "fa3c46cf079d28b086fe1025349bb00223a5d5e9"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"2.8.0-beta1",
"2.8.0-beta2",
"2.8.0-beta3",
"2.8.0-beta4",
"2.8.0-beta5",
"2.8.0-beta6",
"v2.7.8",
"v2.8.0.beta6",
"v2.8.0.beta5",
"v2.7.7",
"v2.7.6",
"v2.8.0.beta4",
"v2.8.0.beta3",
"v2.7.5",
"v2.7.4",
"v2.7.3",
"v2.8.0.beta2",
"v2.7.2",
"v2.7.1",
"v2.7.0",
"v2.8.0.beta1",
"v2.6.7",
"v2.6.6",
"v2.6.5",
"v2.6.4",
"v2.6.3",
"v2.6.2",
"v2.6.1",
"v2.6.0",
"v2.5.5",
"v2.5.4",
"v2.5.3",
"v2.5.2",
"v2.5.1",
"v2.5.0",
"v2.4.5",
"v2.4.4",
"v2.4.3",
"v2.4.2",
"v2.4.1",
"v2.4.0",
"v2.3.10",
"v2.3.9",
"v2.3.8",
"v2.3.7",
"v2.3.6",
"v2.3.5",
"v2.3.4",
"v2.3.3",
"v2.3.2",
"v2.3.1",
"v2.3.0",
"v2.2.6",
"v2.2.5",
"v2.2.4",
"v2.2.3",
"v2.2.2",
"v2.2.1",
"v2.2.0",
"v2.1.8",
"v2.1.7",
"v2.1.6",
"v2.1.5",
"v2.1.4",
"v2.1.3",
"v2.1.2",
"v2.1.1",
"v2.1.0",
"v2.0.5",
"v2.0.4",
"v2.0.3",
"v2.0.2",
"v2.0.1",
"v2.0.0",
"v1.9.7",
"v1.9.6",
"v1.9.5",
"v1.9.4",
"v1.9.3",
"v1.9.2",
"v1.9.1",
"v1.9.0",
"v1.8.11",
"v1.8.10",
"v1.8.9",
"v1.8.8",
"v1.8.7",
"v1.8.6",
"v1.8.5",
"v1.8.4",
"v1.8.3",
"v1.8.2",
"v1.8.1",
"v1.8.0",
"v1.7.10",
"v1.7.9",
"v1.7.8",
"v1.7.7",
"v1.7.6",
"v1.7.5",
"v1.7.4",
"v1.7.3",
"v1.7.2",
"v1.7.1",
"v1.7.0",
"v1.6.10",
"v1.6.9",
"v1.6.8",
"v1.6.7",
"v1.6.6",
"v1.6.5",
"v1.6.4",
"v1.6.3",
"v1.6.2",
"v1.6.1",
"v1.6.0",
"v1.5.4",
"v1.5.3",
"v1.5.2",
"v1.5.1",
"v1.5.0",
"v1.4.7",
"v1.4.6",
"v1.4.5",
"v1.4.4",
"v1.4.3",
"v1.4.2",
"v1.4.1",
"v1.4.0",
"v1.3.5",
"v1.3.4",
"v1.3.3",
"v1.3.2",
"v1.3.1",
"v1.3.0",
"v1.2.4",
"v1.2.3",
"v1.2.2",
"v1.2.1",
"v1.2.0",
"v1.1.3",
"v1.1.2",
"v1.1.1",
"v1.1.0",
"v1.0.4",
"v1.0.3",
"v1.0.2",
"v1.0.1",
"v1.0.0",
"v0.9.9.18",
"v0.9.9.17",
"v0.9.9.16",
"v0.9.9.15",
"v0.9.9.14",
"v0.9.9.13",
"v0.9.9.12",
"v0.9.9.11",
"v0.9.9.10",
"v0.9.9.9",
"v0.9.9.8",
"v0.9.9.7",
"v0.9.9.6",
"v0.9.9.5",
"v0.9.9.4",
"v0.9.9.3",
"v0.9.9.2",
"v0.9.9.1",
"v0.9.8.11",
"v0.9.8.10",
"v0.9.8.9",
"v0.9.8.8",
"v0.9.8.7",
"v0.9.8.6",
"v0.9.8.5",
"v0.9.8.4",
"v0.9.8.3",
"v0.9.8.2",
"v0.9.8.1",
"v0.9.8",
"v0.9.7.9",
"v0.9.7.8",
"v0.9.7.7",
"v0.9.7.6",
"v0.9.7.5",
"v0.9.7.4",
"v0.9.7.3",
"v0.9.7.2",
"v0.9.7.1",
"v0.9.7",
"v0.9.6.4",
"v0.9.6.3",
"v0.9.6.1",
"v0.9.6",
"v0.9.5.2",
"v0.9.5.1",
"v0.9.5",
"v0.9.4",
"v0.9.3",
"v0.9.2.6",
"v0.9.2.5",
"v0.9.2",
"v0.9.1",
"v0.9.0",
"v0.8.9",
"v0.8.8",
"v0.8.7",
"v0.8.6",
"v0.8.5",
"v0.8.4",
"v0.8.3",
"v0.8.2",
"v0.8.1",
"v0.8.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41163.json"
}
}
],
"modified": "2026-10-20T10:53:56.691961227Z",
"provider": "osv",
"references": [
"https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq",
"https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-41163",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384785,
"published_at": "2021-10-20T23:15:07.477+00:00"
}