0xJacky Nginx UI up to 2.4.0 User Management Endpoint improper authorization

Summaryinfo

A vulnerability classified as very critical has been found in 0xJacky Nginx UI up to 2.4.0. This affects an unknown function of the component User Management Endpoint. The manipulation leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-84314. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in 0xJacky Nginx UI up to 2.4.0 and classified as very critical. This issue affects some unknown processing of the component User Management Endpoint. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, the POST /api/users/:id user-management endpoint permits an authenticated user to change another user's password without passing RequireSecureSession, even though the self-service password-change path requires that step-up. An attacker with an authenticated account can change the initial administrator's password, invalidate existing administrator tokens, and then authenticate as the administrator. This issue is fixed in version 2.4.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-84314 since 09/01/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 2.4.1 eliminates this vulnerability.

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Productinfo

Type

• Web Server

Vendor

• 0xJacky

Name

• Nginx UI

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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