Is CVE-2025-21611 actively exploited?

No active exploitation of CVE-2025-21611 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-21611 be exploited remotely?

Yes. CVE-2025-21611 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-21611?

CVE-2025-21611 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2025-21611

HIGH

CVE-2025-21611

CWE-285Published: January 6, 2025· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-21611 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.