{"id":"CVE-2023-34243","aliases":["EUVD-2023-38330","GHSA-w3jx-4x93-76ph"],"status":"published","title":"Windows user name disclosure in TGstation","description":"TGstation is a toolset to manage production BYOND servers. In affected versions if a Windows user was registered in tgstation-server (TGS), an attacker could discover their username by brute-forcing the login endpoint with an invalid password. When a valid Windows logon was found, a distinct response would be generated. This issue has been addressed in version 5.12.5. Users are advised to upgrade. Users unable to upgrade may be mitigated by rate-limiting API calls with software that sits in front of TGS in the HTTP pipeline such as fail2ban.","severity":{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0046,"percentile":0.40152,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200","CWE-307"],"published":"2023-06-08T21:09:14Z","modified":"2026-10-28T02:31:12Z","products":[{"vendor":"tgstation","product":"tgstation-server"},{"vendor":"tgstation13","product":"tgstation-server"}],"references":[{"url":"https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76ph","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Vendor Advisory","advisory"]},{"url":"https://github.com/tgstation/tgstation-server/pull/1526","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34243.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34243","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-34243","title":"Windows user name disclosure in TGstation","description":"TGstation is a toolset to manage production BYOND servers. In affected versions if a Windows user was registered in tgstation-server (TGS), an attacker could discover their username by brute-forcing the login endpoint with an invalid password. When a valid Windows logon was found, a distinct response would be generated. This issue has been addressed in version 5.12.5. Users are advised to upgrade. Users unable to upgrade may be mitigated by rate-limiting API calls with software that sits in front of TGS in the HTTP pipeline such as fail2ban.","status":"published","published":"2023-06-08T21:09:14.628Z","modified":"2025-01-06T19:27:20.871Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:35:35.912488Z"}],"euvd":[{"id":"EUVD-2023-38330","description":"TGstation is a toolset to manage production BYOND servers. In affected versions if a Windows user was registered in tgstation-server (TGS), an attacker could discover their username by brute-forcing the login endpoint with an invalid password. When a valid Windows logon was found, a distinct response would be generated. This issue has been addressed in version 5.12.5. Users are advised to upgrade. Users unable to upgrade may be mitigated by rate-limiting API calls with software that sits in front of TGS in the HTTP pipeline such as fail2ban.","status":"published","published":"2023-06-08T21:09:14Z","modified":"2025-01-06T19:27:20Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:25.174818Z"}],"nvd":[{"id":"CVE-2023-34243","description":"TGstation is a toolset to manage production BYOND servers. In affected versions if a Windows user was registered in tgstation-server (TGS), an attacker could discover their username by brute-forcing the login endpoint with an invalid password. When a valid Windows logon was found, a distinct response would be generated. This issue has been addressed in version 5.12.5. Users are advised to upgrade. Users unable to upgrade may be mitigated by rate-limiting API calls with software that sits in front of TGS in the HTTP pipeline such as fail2ban.","status":"published","published":"2023-06-08T22:15:09.437Z","modified":"2026-06-17T06:03:12.497Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","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-200","CWE-307"],"updated_at":"2026-11-02T14:08:05.329837Z"}],"osv":[{"id":"CVE-2023-34243","title":"Windows user name disclosure in TGstation","description":"TGstation is a toolset to manage production BYOND servers. In affected versions if a Windows user was registered in tgstation-server (TGS), an attacker could discover their username by brute-forcing the login endpoint with an invalid password. When a valid Windows logon was found, a distinct response would be generated. This issue has been addressed in version 5.12.5. Users are advised to upgrade. Users unable to upgrade may be mitigated by rate-limiting API calls with software that sits in front of TGS in the HTTP pipeline such as fail2ban.","status":"published","published":"2023-06-08T21:09:14.628Z","modified":"2026-10-28T02:31:12.053327364Z","cvss":[{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:44:32.116263Z"}]}}