How severe is CVE-2023-34243?

CVE-2023-34243 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-34243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34243?

CVE-2023-34243 affects Tgstation13 Tgstation-server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-34243 published?

CVE-2023-34243 was published on 2023-06-08 and last updated on 2026-06-17.

CVE-2023-34243

CVE-2023-34243 is a medium-severity vulnerability in Tgstation13 Tgstation-server with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-307.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Tgstation13 Tgstation-server
Published: 2023-06-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-34243?: 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.
How severe is CVE-2023-34243?: CVE-2023-34243 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-34243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34243?: CVE-2023-34243 affects Tgstation13 Tgstation-server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-34243 published?: CVE-2023-34243 was published on 2023-06-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tgstation13:tgstation-server:*:*:*:*:*:*:*:*

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