{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d1f36fece6f715bc85bd5c468618efea10b8a1b7"
            },
            {
              "fixed": "b86d678e9fc5dc4b81bf90a2959f7f25a81f7146"
            }
          ],
          "repo": "https://github.com/tgstation/tgstation-server",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-w3jx-4x93-76ph"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-200"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34243.json"
  },
  "details": "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.",
  "id": "CVE-2023-34243",
  "modified": "2026-04-01T23:08:07.155132650Z",
  "published": "2023-06-08T21:09:14.628Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34243.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76ph"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-34243"
    },
    {
      "type": "FIX",
      "url": "https://github.com/tgstation/tgstation-server/pull/1526"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Windows user name disclosure in TGstation"
}