CVE-2023-28361Network attack vector

Confidential-data disclosure via hijacked WebSocket session

Published May 11, 2023 · Updated Jan 27, 2025

Cross-site WebSocket hijacking in Ubiquiti UniFi OS 2.5 and earlier allows remote attackers to read confidential data through a user's browser. Ubiquiti has not published the affected WebSocket endpoint or the origin and session validation it performs incorrectly. Exploitation requires a signed-in UniFi OS user to visit an attacker-controlled webpage; the reported consequence is data disclosure only.

CVSS severity6.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site WebSocket hijacking in Ubiquiti UniFi OS 2.5 and earlier allows remote attackers to read confidential data through a user's browser. Ubiquiti has not published the affected WebSocket endpoint or the origin and session validation it performs incorrectly. Exploitation requires a signed-in UniFi OS user to visit an attacker-controlled webpage; the reported consequence is data disclosure only.

The record

CVE
CVE-2023-28361
Published
May 11, 2023
Updated
Jan 27, 2025
Vendor
Ubiquiti
Product
UniFi OS
Classifications
CWE-352, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Fixed in UniFi OS 3.0.13 or later.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ubiquiti · UniFi OSversion=Fixed in UniFi OS 3.0.13 or later.

Published CVSS scores

6.1UbiquitiCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo