CVE-2023-31997: UniFi OS 3.1 introduces a misconfiguration on consoles running UniFi Network that allows users on a local netw

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CRITICAL 9.0MITIGATE

CVE-2023-31997 is a critical-severity flaw (CVSS 9.0) affecting unifi os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

UniFi OS 3.1 introduces a misconfiguration on consoles running UniFi Network that allows users on a local network to access MongoDB. Applicable Cloud Keys that are both (1) running UniFi OS 3.1 and (2) hosting the UniFi Network application. "Applicable Cloud Keys" include the following: Cloud Key Gen2 and Cloud Key Gen2 Plus.

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-863
Published	2023-07-01
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: ui

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-01 00:15 UTCPublished CVE record published
2026-06-17 05:57 UTCUpdated Record last modified

ui unifi os MITIGATE

Affected: 3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-31997?

unifi os: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-31997 being exploited?

CVE-2023-31997 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-31997 affect?

CVE-2023-31997 affects unifi os. Severity is critical (CVSS 9.0). UniFi OS 3.1 introduces a misconfiguration on consoles running UniFi Network that allows users on a local network to access MongoDB. Applicable Cloud Keys that are both (1) running UniFi OS 3.1 and (2) hosting the UniFi Network application.

How urgent is CVE-2023-31997?

Priority 36/100. Critical severity

Software pages

MongoDB vulnerabilities · Ubiquiti vulnerabilities

Related CVEs

CVE-2023-28361 MEDIUM 6.5 UPGRADE A Cross-site WebSocket Hijacking (CSWSH) vulnerability found in UniFi OS 2.5 and earlier allows a malicious ac

References

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