CVE-2025-21611 – Tgstation-Server Authorization Bypass

The following table lists the changes that have been made to the
CVE-2025-21611 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Jan. 06, 2025

    Action Type Old Value New Value
    Added Description 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 enabled users access to most, but not all, authorized actions regardless of their permissions. Notably, the WriteUsers right is unaffected so users may not use this bug to permanently elevate their account permissions. The fix is release in tgstation-server-v6.12.3.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-285
    Added Reference https://github.com/tgstation/tgstation-server/commit/e7b1189620baaf03c2d23f6e164d07c7c7d87d57
    Added Reference https://github.com/tgstation/tgstation-server/issues/2064
    Added Reference https://github.com/tgstation/tgstation-server/security/advisories/GHSA-rf5r-q276-vrc4
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