CVE-2023-34243

MEDIUM

tgstation-server 4.0.0-5.12.4 - Unauthenticated Username Enumeration via Login Endpoint Brute Force

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Issue Tracking, Patch x_refsource_misc
https://github.com/tgstation/tgstation-server/pull/1526

Scores

CVSS v3 5.8
EPSS 0.0046
EPSS Percentile 36.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-200 CWE-307
Status published
Products (1)
tgstation13/tgstation-server 4.0.0.0 - 5.12.5
Published Jun 08, 2023
Tracked Since Feb 18, 2026