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

Q: How do I fix CVE-2023-28361?

unifi os: upgrade to 3.0.13. Exact commands for each OS are on this page.

Q: Is CVE-2023-28361 being exploited?

CVE-2023-28361 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-28361 affect?

CVE-2023-28361 affects unifi os. Severity is medium (CVSS 6.5). A Cross-site WebSocket Hijacking (CSWSH) vulnerability found in UniFi OS 2.5 and earlier allows a malicious actor to access certain confidential information by persuading a UniFi OS user to visit a malicious webpage.Affected Products:Cloud

Q: How urgent is CVE-2023-28361?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2023-28361 is a medium-severity flaw (CVSS 6.5) affecting unifi os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Cross-site WebSocket Hijacking (CSWSH) vulnerability found in UniFi OS 2.5 and earlier allows a malicious actor to access certain confidential information by persuading a UniFi OS user to visit a malicious webpage.Affected Products:Cloud Key Gen2Cloud Key Gen2 PlusUNVRUNVR ProfessionalUDMUDM ProfessionalUDM SEUDRMitigation:Update affected products to UniFi OS 3.0.13 or later.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-05-11
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: uni

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

Am I affected?

Timeline

2023-05-11 22:15 UTCPublished CVE record published
2026-06-17 05:47 UTCUpdated Record last modified

uni unifi os UPGRADE

Affected: < 3.0.13

Fixed in: 3.0.13

Safe to downgrade to: no unaffected older release

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-2023-28361?

unifi os: upgrade to 3.0.13. Exact commands for each OS are on this page.

Is CVE-2023-28361 being exploited?

CVE-2023-28361 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-2023-28361 affect?

CVE-2023-28361 affects unifi os. Severity is medium (CVSS 6.5). A Cross-site WebSocket Hijacking (CSWSH) vulnerability found in UniFi OS 2.5 and earlier allows a malicious actor to access certain confidential information by persuading a UniFi OS user to visit a malicious webpage.Affected Products:Cloud

How urgent is CVE-2023-28361?

Priority 28/100. No elevated risk signals yet.

Software pages

Ubiquiti vulnerabilities

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References

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