Medium
Security advisory
Discourse is a platform for community discussion. In affected versions a maliciously crafted request could cause an error response to be cached by intermediate proxies. This could cause a loss of confidentiality for some content. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-41271
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:57 UTC · Revision 1
Source evidence
Discourse is a platform for community discussion. In affected versions a maliciously crafted request could cause an error response to be cached by intermediate proxies. This could cause a loss of confidentiality for some content. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.
osv:CVE-2021-41271
Complete source record
{
"id": "53d8f6dcc5e2dc6ca8b3e6b87c43507b448a62aab431f98e8f11dbd454c5e30f",
"url": "https://osv.dev/vulnerability/CVE-2021-41271",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-41271",
"summary": "Discourse is a platform for community discussion. In affected versions a maliciously crafted request could cause an error response to be cached by intermediate proxies. This could cause a loss of confidentiality for some content. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.",
"evidence": "osv:CVE-2021-41271",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-41271",
"aliases": [
"BIT-discourse-2021-41271",
"CVE-2021-41271",
"GHSA-hf6r-mc9j-hf4p"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "a1dcf3a50cdc69a33e7174eb23e2415fc32de79f"
},
{
"introduced": "05c1d3c9cdd7f3e365bedc397dd92a7e7bc2c40f"
},
{
"last_affected": "ae91818c194a79b9a5216f2a2709a331f3509207"
},
{
"fixed": "2da0001965c6d8632d723c46ea5df9f22a1a23f1"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "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": [
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"introduced": "2.8.0-beta2"
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{
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"source": "CPE_STRING"
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{
"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"
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{
"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"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-beta7"
},
{
"last_affected": "2.8.0-beta7"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "2da0001965c6d8632d723c46ea5df9f22a1a23f1"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41271.json"
}
}
],
"modified": "2026-10-20T10:54:58.236569536Z",
"provider": "osv",
"references": [
"https://github.com/discourse/discourse/security/advisories/GHSA-hf6r-mc9j-hf4p",
"https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-41271",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386588,
"published_at": "2021-11-15T22:15:06.977+00:00"
}