{"id":"CVE-2025-64528","aliases":["BIT-discourse-2025-64528","EUVD-2025-205817","GHSA-c59w-jwx7-34v4"],"status":"published","title":"Users are able to find users by name even when `enable_names` is off","description":"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.","severity":{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00287,"percentile":0.21434,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-202"],"published":"2025-12-30T16:04:10Z","modified":"2026-10-28T02:30:36Z","fixes":[{"ecosystem":"Bitnami","package":"discourse","fixed_in":["3.5.3","2025.11.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"discourse","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.5.3"},{"introduced":"2025.11.0"},{"fixed":"2025.11.1"}]}]}],"products":[{"vendor":"discourse","product":"discourse"}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4","tags":["x_refsource_CONFIRM","Third Party Advisory","advisory"]},{"url":"https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64528","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64528.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-64528","title":"Users are able to find users by name even when `enable_names` is off","description":"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.","status":"published","published":"2025-12-30T16:04:10.093Z","modified":"2025-12-30T18:11:53.787Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-202"],"updated_at":"2026-11-02T14:32:46.750177Z"}],"euvd":[{"id":"EUVD-2025-205817","description":"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.","status":"published","published":"2025-12-30T16:04:10Z","modified":"2025-12-30T18:11:53Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T19:48:59.952758Z"}],"nvd":[{"id":"CVE-2025-64528","description":"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.","status":"published","published":"2025-12-30T16:15:45.93Z","modified":"2026-06-17T09:54:32.527Z","cvss":[{"version":"4.0","score":6.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-202"],"updated_at":"2026-11-02T14:11:54.323368Z"}],"osv":[{"id":"CVE-2025-64528","title":"Users are able to find users by name even when `enable_names` is off","description":"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.","status":"published","published":"2025-12-30T16:04:10.093Z","modified":"2026-10-28T02:30:36.277816441Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-202"],"updated_at":"2026-11-02T15:44:51.851511Z"},{"id":"BIT-discourse-2025-64528","title":"Users are able to find users by name even when `enable_names` is off","description":"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.","status":"published","published":"2026-01-08T11:40:33.666Z","modified":"2026-09-08T08:46:18.985766122Z","updated_at":"2026-11-02T15:28:29.152062Z"}]}}