High
Discourse vulnerable to unlimited mentioned users in message serializer
Type: advisorySources: OSV
Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions (@all and @here) which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-48297
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 13:01 UTC · Revision 1
Source evidence
Discourse vulnerable to unlimited mentioned users in message serializer
core-osv · Original sourcePublished 12 Jan 2024, 20:35 UTC
Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions (@all and @here) which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5.
osv:CVE-2023-48297
Complete source record
{
"id": "d30fcfb45c70896c3f7135aa111692cdeb6ea5528de4f92e99b5f154dc2370bf",
"url": "https://osv.dev/vulnerability/CVE-2023-48297",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Discourse vulnerable to unlimited mentioned users in message serializer",
"summary": "Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions (@all and @here) which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5.",
"evidence": "osv:CVE-2023-48297",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2023-48297",
"aliases": [
"BIT-discourse-2023-48297",
"CVE-2023-48297",
"GHSA-hf2v-r5xm-8p37"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/discourse/discourse",
"type": "GIT",
"events": [
{
"introduced": "0"
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{
"fixed": "2d4ed7d02053df72aedd2dcebfdd5768e8065103"
},
{
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},
{
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}
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"database_specific": {
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{
"cpe": "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*",
"range": [
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"introduced": "0"
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{
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"source": "CPE_RANGE"
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{
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"range": [
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{
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],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:discourse:discourse:3.2.0:beta2:*:*:beta:*:*:*",
"range": [
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"introduced": "3.2.0-beta2"
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{
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{
"cpe": "cpe:2.3:a:discourse:discourse:3.2.0:beta3:*:*:beta:*:*:*",
"range": [
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}
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-48297.json"
}
}
],
"modified": "2026-10-28T02:30:28.788960206Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48297.json",
"https://github.com/discourse/discourse/security/advisories/GHSA-hf2v-r5xm-8p37",
"https://nvd.nist.gov/vuln/detail/CVE-2023-48297"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48297.json"
}
},
"related_cves": [
{
"value": "CVE-2023-48297",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 495645,
"published_at": "2024-01-12T20:35:02.394+00:00"
}