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CVE-2023-34243

Windows user name disclosure in TGstation

MEDIUM
5.3
CVSS Score
Published: June 8, 2023 at 09:09 PM UTC
Updated: June 17, 2026 at 06:03 AM UTC
2 products affected across 2 vendorsTgstation ServerTgstation Server

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tgstation Server· TGSTATION13
95%
4.0.0.0 ≤ v < 5.12.5
Affected range stops below 5.12.5, so it looks safe — our inference, not a vendor statement
Tgstation Server· Tgstation
60%
v < 5.12.5
Affected range stops below 5.12.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCIssue TrackingPatch
Source: [email protected]
https://github.com/tgstation/tgstation-server/pull/1526
x_refsource_CONFIRMMitigationVendor Advisory
Source: [email protected]
https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76ph

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200CWE-307

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