High
Security advisory
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-3138
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:45 UTC · Revision 1
Source evidence
In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.
osv:CVE-2021-3138
Complete source record
{
"id": "9a3aaf06e0e003eec59ce06061b77758b2084954ab838b722373821b4b968f4c",
"url": "https://osv.dev/vulnerability/CVE-2021-3138",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-3138",
"summary": "In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.",
"evidence": "osv:CVE-2021-3138",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-3138",
"aliases": [
"BIT-discourse-2021-3138",
"CVE-2021-3138"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "d6121249d3856a40382637ed12db50fc43c1fb1d"
},
{
"introduced": "99240476cbb9ce7bb96e5017964d14ef7f768160"
},
{
"last_affected": "99240476cbb9ce7bb96e5017964d14ef7f768160"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.6.0"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:2.7.0:beta1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.7.0-beta1"
},
{
"last_affected": "2.7.0-beta1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3138.json"
}
}
],
"modified": "2026-10-20T10:54:39.674915226Z",
"provider": "osv",
"references": [
"https://github.com/Mesh3l911/Disource",
"https://github.com/discourse/discourse/releases"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-3138",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385821,
"published_at": "2021-01-14T04:15:15.073+00:00"
}