CVE-2023-34243

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.

Categories

5.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.18%
Vendor Advisory github.com
Affected: tgstation tgstation-server
Published at:
Updated at:

References

Link Tags
https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76ph mitigation vendor advisory
https://github.com/tgstation/tgstation-server/pull/1526 patch issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-34243?
CVE-2023-34243 has been scored as a medium severity vulnerability.
How to fix CVE-2023-34243?
To fix CVE-2023-34243, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-34243 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-34243 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-34243?
CVE-2023-34243 affects tgstation tgstation-server.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.