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TI-2025-16999 Aliases CVE-2025-23214

Cosmos userbase checking vulnerability

Priority LOW 37CWE-204Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-204.

Summary

Cosmos provides users the ability self-host a home server by acting as a secure gateway to your application, as well as a server manager. By monitoring the error code returned in the login, it is possible to figure out whether a user exist or not in the database. Patched in 0.17.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00657 51st percentileScored 2026-11-07
Fix Fixed Cosmos-Server (azukaar): 0.17.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
azukaarCosmos-Serverbefore 0.17.70.17.7Patch availableCNA
  • Cosmos-Server Vendorazukaar Affected before 0.17.7 Fixed in 0.17.7 Patch available CNA

Remediation

  • Fix · CNA Cosmos-Server (azukaar) Fixed in 0.17.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-23214
  2. 2026-10-27 EPSS moved to the 50th–90th percentile

References

Other 2

  • TI-2026-36601 Cosmos: Authentication bypass via forward-auth header smuggling on Constellation tunnel in Cosmos-Server CVSS 3.1MEDIUM 6.1
  • TI-2026-36602 Cosmos-Server's constellation public-devices endpoint accepts arbitrary bearer tokens CVSS 3.1MEDIUM 5.3

Sources

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