CVE-2026-111681
EFAK through 5.1.0 Privilege Escalation via /api/users REST API
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | smartloli |
| Product | efak |
| Published | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
smartloli / EFAK
5.0.0 ≤ 5.1.0
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/efak-missing-admin-gate-user-management-api github.com: https://github.com/smartloli/EFAK/blob/v5.1.0/efak-web/src/main/java/org/kafka/eagle/web/security/config/WebSecurityConfig.java#L89-L93 github.com: https://github.com/smartloli/EFAK/blob/v5.1.0/efak-web/src/main/java/org/kafka/eagle/web/controller/UserController.java#L218-L302 github.com: https://github.com/smartloli/EFAK vulncheck.com: https://www.vulncheck.com/advisories/efak-through-5.1.0-privilege-escalation-via-api-users-rest-api
Credits
hieuPenguinnn