CVE-2025-21611

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

January 6, 2025

Last Modified

August 19, 2025

Advisory Details (3)

Auto-updated Aug 7, 2026
Patch available. Sources: github, github_commit.
github Patch Available

Role authorization incorrectly OR'd with user's enabled status · Advisory · tgstation/tgstation-server · GitHub

https://github.com/tgstation/tgstation-server/security/advisories/GHSA-rf5r-q276-vrc4
generic

Can still read `/Repository` even when `RepositoryRights.Read` is unset · Issue #2064 · tgstation/tgstation-server · GitHub

https://github.com/tgstation/tgstation-server/issues/2064
github_commit

commit e7b1189620ba (tgstation/tgstation-server)

Fix landed in tgstation/tgstation-server commit e7b1189620ba — awaiting tagged release

https://github.com/tgstation/tgstation-server/commit/e7b1189620baaf03c2d23f6e164d07c7c7d87d57

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
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  1. 2026-08-23 00:18 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-21611?
CVE-2025-21611 is a high vulnerability published on January 6, 2025. 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…
When was CVE-2025-21611 disclosed?
CVE-2025-21611 was first published in the National Vulnerability Database on January 6, 2025, with the most recent update on August 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21611 actively exploited?
CVE-2025-21611 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 60.1% of all scored CVEs.
What is the CVSS score of CVE-2025-21611?
CVE-2025-21611 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2025-21611?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21611, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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