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Vulnerability record · CVE-2021-22957 · published 24 November 2021

CVE-2021-22957: Ui unifi protect vulnerability

Ui · Unifi Protect

A Cross-Origin Resource Sharing (CORS) vulnerability found in UniFi Protect application Version 1.19.2 and earlier allows a malicious actor who has convinced a privileged user to access a URL with malicious code to take over said user’s account.This vulnerability is fixed in UniFi Protect application Version 1.20.0 and later.

8.8 CVSS 3.1 High EPSS 0.91% · top 41.6% CWE-16 · CWE-16
8.8CVSS 3.1 base score, v2 6.8
0.91%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A Cross-Origin Resource Sharing (CORS) vulnerability found in UniFi Protect application Version 1.19.2 and earlier allows a malicious actor who has convinced a privileged user to access a URL with malicious code to take over said user’s account.This vulnerability is fixed in UniFi Protect application Version 1.20.0 and later.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://community.ui.com/releases/Security-Advisory-Bulletin-021-021/62bd8841-6603-4fee-9dba-73037148f173 PatchVendor Advisory
https://community.ui.com/releases/Security-Advisory-Bulletin-021-021/62bd8841-6603-4fee-9dba-73037148f173 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-55115Ui unifi protect server-side request forgery (ssrf) vulnerabilityA malicious actor with access to the network and low privileges could exploit a Server-Side Request Forgery (SSRF) in UniFi Protect Application to es…EPSS 0.47%9.8CVE-2026-54408Ui unifi protect improper access control vulnerabilityA malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi Protect Application to bypass auth…EPSS 0.57%9.6CVE-2021-22943Ui unifi protect improper authentication vulnerabilityA vulnerability found in UniFi Protect application V1.18.1 and earlier permits a malicious actor who has already gained access to a network to subseq…EPSS 0.41%8.8CVE-2026-56841Ui unifi protect sql injection vulnerabilityA malicious actor with access to the network and low privileges could exploit an authenticated SQL Injection vulnerability found in UniFi Protect App…EPSS 0.49%8.8CVE-2026-21633Ui unifi protect improper authentication vulnerabilityA malicious actor with access to the adjacent network could obtain unauthorized access to a UniFi Protect Camera by exploiting a discovery protocol v…EPSS 0.45%8.6CVE-2026-54407Ui unifi protect improper access control vulnerabilityA malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi Protect Application to bypass auth…EPSS 0.45%8.1CVE-2026-54409Ui unifi protect vulnerabilityA malicious actor with access to the network and under certain conditions could exploit an Improper Initialization vulnerability found in UniFi Prote…EPSS 0.44%8.0CVE-2021-22944Ui unifi protect vulnerabilityA vulnerability found in UniFi Protect application V1.18.1 and earlier allows a malicious actor with a view-only role and network access to gain the …EPSS 0.42%

Source: NIST National Vulnerability Database (record CVE-2021-22957), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.