CVE-2023-49115
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 · uneditedMachineSense devices use unauthenticated MQTT messaging to monitor devices and remote viewing of sensor data by users.
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 confidenceMachineSense devices use unauthenticated MQTT messaging for device monitoring and remote sensor data viewing. The lack of authentication on the MQTT protocol allows any network-attacker to subscribe to sensor data topics and eavesdrop on or potentially inject manipulated data into the monitoring stream.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 Machinesense Feverwarn devices on your networkScan your network for devices running MQTT service on port 1883 (or 8883 for TLS). Check device fingerprints, MAC OUI lookup for MachineSense vendor, or review asset inventory for Feverwarn firmware devices.Affected if You have deployed Machinesense Feverwarn devices with MQTT service exposed on your network.
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Verify MQTT broker authentication settingsAccess your MQTT broker configuration (e.g., Mosquitto, HiveMQ, AWS IoT Core) and inspect the authentication settings. Check if anonymous access is permitted or if username/password, certificates, or token-based authentication is required.Affected if The MQTT broker allows anonymous or unauthenticated connections (no username/password, certificates, or tokens required).
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Test MQTT connection without credentialsAttempt to connect to the MQTT broker using a client (like mosquitto_pub/mosquitto_sub or MQTT Explorer) without providing any authentication credentials. Observe if the connection is successful.Affected if You can connect to the MQTT broker and subscribe to topics without providing any credentials.
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Confirm TLS encryption is not enforcedCheck if the MQTT broker is configured to require TLS/SSL (typically port 8883). Attempt an unencrypted connection on port 1883 and verify it succeeds. Review broker logs for encrypted vs unencrypted connection metrics.Affected if MQTT connections are allowed over unencrypted port 1883 without requiring TLS.
Your environment is affected if you have Machinesense Feverwarn devices and your MQTT broker accepts unauthenticated and/or unencrypted connections.
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 dataImplement MQTT authentication (username/password, certificates, or token-based) and enforce TLS encryption for all MQTT communications. Deploy firmware updates to affected devices to enforce authenticated connections.
- Consultation6.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $9,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-49115 — 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-2023-49115 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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