What is CVE-2025-21611?

CVE-2025-21611 is a high-severity vulnerability in Tgstation Tgstation-server, classified under Improper Authorization. CVSS score: 8.8/10. Published 2025-01-06.

How severe is CVE-2025-21611?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Tgstation Tgstation-server

CVE-2025-21611

tgstation-server is a production scale tool for BYOND server management. Prior to 6.12.3, roles used to authorize API methods were incorrectly OR'd instead of AND'ed with the role used to determine if a user was enabled. This allows enable…

EPSS: 0.004 (61.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tgstation Tgstation-server — versions >= 6.11.0, < 6.12.3

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

https://github.com/tgstation/tgstation-server/security/advisories/GHSA-rf5r-q276-vrc4 (x_refsource_CONFIRM)
https://github.com/tgstation/tgstation-server/issues/2064 (x_refsource_MISC)
https://github.com/tgstation/tgstation-server/commit/e7b1189620baaf03c2d23f6e164d07c7c7d87d57 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-21611?: CVE-2025-21611 is a high-severity vulnerability in Tgstation Tgstation-server, classified under Improper Authorization. CVSS score: 8.8/10. Published 2025-01-06.
How severe is CVE-2025-21611?: High severity. CVSS v3 base score is 8.8 out of 10.