Medium
Security advisory
Discourse is an open-source platform for community discussion. In Discourse before versions 2.7.8 and 2.8.0.beta5, a user's read state for a topic such as the last read post number and the notification level is exposed.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-37703
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:19 UTC · Revision 1
Source evidence
Discourse is an open-source platform for community discussion. In Discourse before versions 2.7.8 and 2.8.0.beta5, a user's read state for a topic such as the last read post number and the notification level is exposed.
osv:CVE-2021-37703
Complete source record
{
"id": "f6c06ea4fceb916b78cc6f273633d2ec394d6bf160adc49b14f18090aab1f4a2",
"url": "https://osv.dev/vulnerability/CVE-2021-37703",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-37703",
"summary": "Discourse is an open-source platform for community discussion. In Discourse before versions 2.7.8 and 2.8.0.beta5, a user's read state for a topic such as the last read post number and the notification level is exposed.",
"evidence": "osv:CVE-2021-37703",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-37703",
"aliases": [
"BIT-discourse-2021-37703",
"CVE-2021-37703",
"GHSA-gq2h-qhg2-phf9"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "18b6f4ecf6d3513af90b8a54a3514dfa160044d8"
},
{
"introduced": "05c1d3c9cdd7f3e365bedc397dd92a7e7bc2c40f"
},
{
"last_affected": "cb858af8c79032a90bc374d566225c75e22cf6a6"
},
{
"fixed": "aed65ec16d38886d7be7209d8c02df4ffd4937a4"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.7.8"
}
],
"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"
},
{
"range": [
{
"fixed": "aed65ec16d38886d7be7209d8c02df4ffd4937a4"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37703.json"
}
}
],
"modified": "2026-10-20T10:53:51.596399713Z",
"provider": "osv",
"references": [
"https://github.com/discourse/discourse/security/advisories/GHSA-gq2h-qhg2-phf9",
"https://github.com/discourse/discourse/commit/aed65ec16d38886d7be7209d8c02df4ffd4937a4"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-37703",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384699,
"published_at": "2021-08-13T16:15:07.827+00:00"
}