CVE-2023-34243

Name: CVE-2023-34243
Creator: NVD / NIST
Published: 2023-06-08T22:15:09.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2023-34243 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.46%

36.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tgstation13	Tgstation-Server	>= 4.0.0.0, < 5.12.5

References

https://github.com/tgstation/tgstation-server/pull/1526Issue Tracking, Patch
https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76phMitigation, Vendor Advisory
https://github.com/tgstation/tgstation-server/pull/1526Issue Tracking, Patch
https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76phMitigation, Vendor Advisory

Timeline

Published: Jun 8, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-34243?

How severe is CVE-2023-34243?

CVE-2023-34243 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34243?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34243?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST