Medium
Users are able to find users by name even when `enable_names` is off
Type: advisorySources: OSV
Discourse is an open source discussion platform. Prior to versions 3.5.3, 2025.11.1, and 2025.12.0, an attacker who knows part of a username can find the user and their full name via UI or API, even when `enable_names` is disabled. Versions 3.5.3, 2025.11.1, and 2025.12.0 contain a fix.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-64528
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 13:44 UTC · Revision 1
Source evidence
Users are able to find users by name even when `enable_names` is off
core-osv · Original sourcePublished 30 Dec 2025, 16:04 UTC
Discourse is an open source discussion platform. Prior to versions 3.5.3, 2025.11.1, and 2025.12.0, an attacker who knows part of a username can find the user and their full name via UI or API, even when `enable_names` is disabled. Versions 3.5.3, 2025.11.1, and 2025.12.0 contain a fix.
osv:CVE-2025-64528
Complete source record
{
"id": "90d22f87104f5539d3cb08d7c6c138b2aff34821d4546dfcccdd2e5cee703ca4",
"url": "https://osv.dev/vulnerability/CVE-2025-64528",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Users are able to find users by name even when `enable_names` is off",
"summary": "Discourse is an open source discussion platform. Prior to versions 3.5.3, 2025.11.1, and 2025.12.0, an attacker who knows part of a username can find the user and their full name via UI or API, even when `enable_names` is disabled. Versions 3.5.3, 2025.11.1, and 2025.12.0 contain a fix.",
"evidence": "osv:CVE-2025-64528",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2025-64528",
"aliases": [
"BIT-discourse-2025-64528",
"CVE-2025-64528",
"GHSA-c59w-jwx7-34v4"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "99ca8f2a8b13fad8c6e19c7d8b81f4108a4875b0"
},
{
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{
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{
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{
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}
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"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.5.3"
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"source": "CPE_RANGE"
},
{
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"range": [
{
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{
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"source": "CPE_STRING"
},
{
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"range": [
{
"introduced": "2025.12.0"
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{
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"source": "CPE_STRING"
},
{
"range": [
{
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"source": "REFERENCES_COMMIT"
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{
"range": [
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"source": "REFERENCES_COMMIT"
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{
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"source": "REFERENCES_COMMIT"
}
]
}
}
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],
"modified": "2026-10-28T02:30:36.277816441Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64528.json",
"https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4",
"https://nvd.nist.gov/vuln/detail/CVE-2025-64528",
"https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81",
"https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df",
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64528.json"
}
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"source_id": "core-osv",
"document_id": 503248,
"published_at": "2025-12-30T16:04:10.093+00:00"
}