VULNERABILITY INTELLIGENCE

CVE-2023-34243

CVSS score5.8 MEDIUM

EPSS probability0.46%

CISA KEVNot currently listed

Published2023-06-08

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

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.

Weakness classification

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-307: Improper Restriction of Excessive Authentication Attempts

Primary references

security-advisories@github.com — Issue Tracking, Patch
security-advisories@github.com — Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108 — Mitigation, Vendor Advisory