CVE-2025-49825
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedTeleport provides connectivity, authentication, access controls and audit for infrastructure. Community Edition versions before and including 17.5.1 are vulnerable to remote authentication bypass. At time of posting, there is no available open-source patch.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceTeleport Community Edition versions 17.5.1 and earlier contain a remote authentication bypass vulnerability allowing unauthenticated attackers to gain unauthorized access to the infrastructure connectivity, authentication, and access control platform. The critical severity (CVSS 9.8) indicates complete bypass of authentication mechanisms with no user interaction required.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Teleport installationRun 'teleport version' or 'tsh version' if the binary is in PATH. On Linux systems, also check for running processes: 'ps aux | grep teleport' or check systemd services: 'systemctl list-units | grep teleport'Affected if Teleport binary or service is found on the system
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Determine installed Teleport versionExecute 'teleport version' to obtain the exact version number. Compare this version against the affected range: versions 17.5.1 and earlier are vulnerableAffected if The installed version is 17.5.1 or any earlier version (e.g., 17.5.0, 17.4.x, etc.)
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Verify Teleport service network exposureCheck the configuration file (commonly /etc/teleport.yaml or /etc/teleport.d/teleport.yaml) for the 'auth_service' and 'proxy_service' listen addresses. Use 'ss -tlnp' or 'netstat -tlnp' to identify which interfaces and IP addresses the Teleport ports (typically 443, 3025, 3026) are bound toAffected if Teleport services are bound to 0.0.0.0 or an externally accessible IP rather than localhost or a restricted internal network interface
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Review authentication logs for unauthorized accessExamine Teleport audit logs, typically located in /var/lib/teleport/log or configurable via the auth_service. Look for 'session.start' events with unknown or absent user identities, or 'user.login' failures that succeeded without proper credentialsAffected if Authentication events exist in logs where users or sessions cannot be traced to legitimate authentications, or where unauthenticated access attempts succeeded
You are affected if Teleport Community Edition version 17.5.1 or earlier is installed AND its services are network-accessible, regardless of whether indicators of exploitation are visible in logs.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataSince no patch is available, immediately restrict network exposure of Teleport services to minimal necessary IPs, implement additional network-level authentication controls, review access logs for indicators of compromise, and monitor vendor channels for forthcoming patches.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,352.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-49825 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-49825 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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