smartloli EFAK up to 5.1.0 User Management /api/users UserController improper authorization

Summaryinfo

A vulnerability, which was classified as critical, has been found in smartloli EFAK up to 5.1.0. Affected by this vulnerability is the function UserController of the file /api/users of the component User Management. Performing a manipulation results in improper authorization. This vulnerability was named CVE-2026-111681. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in smartloli EFAK up to 5.1.0. This affects the function UserController of the file /api/users of the component User Management. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

EFAK through 5.1.0 contains a missing authorization vulnerability that allows authenticated low-privilege users to manage accounts because the /api/users endpoints lack administrator role checks. Attackers can send POST, PUT, or DELETE requests to UserController to grant themselves ROLE_ADMIN, create administrators, or delete users, gaining control of managed Kafka clusters.

It is possible to read the advisory at hackmd.io. This vulnerability is uniquely identified as CVE-2026-111681 since 10/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/16/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• smartloli

Name

• EFAK

Version

• 5.0
• 5.1.0

CPE 2.3info

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CPE 2.2info

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