CVE-2025-21611: tgstation-server's role authorization incorrectly OR'd with user's enabled status
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.
Classification
CVE ID: CVE-2025-21611
CVSS Base Severity: HIGH
CVSS Base Score: 8.8
Affected Products
Vendor: tgstation
Product: tgstation-server
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 17.83% (scored less or equal to compared to others)
EPSS Date: 2025-02-04 (when was this score calculated)
References
https://github.com/tgstation/tgstation-server/security/advisories/GHSA-rf5r-q276-vrc4https://github.com/tgstation/tgstation-server/issues/2064
https://github.com/tgstation/tgstation-server/commit/e7b1189620baaf03c2d23f6e164d07c7c7d87d57