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CVE-2026-111681— EFAK through 5.1.0 Privilege Escalation via /api/users REST API

Quick assessment

Affected
smartloli EFAK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

EFAK 5.1.0 及更早版本存在一个缺少权限校验的漏洞。由于 接口未对管理员角色进行验证，经过身份认证的普通低权限用户可以管理账户。攻击者可以向 发送 POST、PUT 或 DELETE 请求，从而自行授予 角色、创建管理员或删除用户，进而获得对受管 Kafka 集群的控制权。

CVSS 8.8 · High EPSS 0.28% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
smartloli EFAK 5.0.0≤ 5.1.0 affected
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I. Basic Information for CVE-2026-111681

Vulnerability Information
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Vulnerability Title
EFAK through 5.1.0 Privilege Escalation via /api/users REST API
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
smartloli EFAK 5.0.0 ~ 5.1.0 -

II. Public POCs for CVE-2026-111681

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III. Intelligence Information for CVE-2026-111681

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Vendor Advisories for CVE-2026-111681 (1)

Proof of Concept for CVE-2026-111681 (1)

Other References for CVE-2026-111681 (1)

IV. Related Vulnerabilities

Same product: EFAK
Same vendor: smartloli
Same weakness: CWE-862

V. Comments for CVE-2026-111681

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