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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-202"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64528.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"fixed": "3.5.3"
},
{
"introduced": "2025.11.0-latest"
},
{
"fixed": "2025.11.1"
},
{
"introduced": "2025.12.0-latest"
},
{
"fixed": "2025.12.0"
}
],
"source": "AFFECTED_FIELD"
}
]
}