Read the docs
TI-2025-15571 Aliases CVE-2025-21611

tgstation-server's role authorization incorrectly OR'd with user's enabled status

Priority MEDIUM 41CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00484 41st percentileScored 2026-11-07
Fix Fixed tgstation-server (tgstation): 6.12.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
tgstationtgstation-server6.11.0 to before 6.12.36.12.3Patch availableCNA
  • tgstation-server Vendortgstation Affected 6.11.0 to before 6.12.3 Fixed in 6.12.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tgstation13:tgstation-server:*:*:*:*:*:*:*:*6.11.0 to before 6.12.3Vulnerabletgstation
  • cpe:2.3:a:tgstation13:tgstation-server:*:*:*:*:*:*:*:* Versions 6.11.0 to before 6.12.3 Vulnerable ·tgstation

Remediation

  • Fix · CNA tgstation-server (tgstation) Fixed in 6.12.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-21611

References

Patch 1

Advisory 1

Other 1

  • TI-2024-27844 Path traversal in tgstation-server CVSS 3.1CRITICAL 9.9
  • TI-2018-12228 In Tgstation tgstation-server 3.2.4.0 through 3.2.1.0 (fixed in 3.2.5.0), active logins… CVSS 3.0CRITICAL 9.8
  • TI-2020-12691 In tgstation-server 4.4.0 and 4.4.1, an authenticated user with permission to download… CVSS 3.1HIGH 7.7
  • TI-2023-15963 Insufficiently Protected ChatBot Credentials in tgstation-server CVSS 3.1HIGH 7.7
  • TI-2023-16375 Incorrectly Specified Chat Message Destinations in tgstation-server and DreamMaker API CVSS 3.1HIGH 7.5
  • TI-2023-17079 Windows user name disclosure in TGstation CVSS 3.1MEDIUM 5.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences