CVE-2024-49358: ZimaOS vulnerable to Username Enumeration via API Responses

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-10-24 · updated 2026-06-17
Weakness: CWE-203

Description

ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In version 1.2.4 and all prior versions, the API endpoint `http://<Server-IP>/v1/users/login` in ZimaOS returns distinct responses based on whether a username exists or the password is incorrect. This behavior can be exploited for username enumeration, allowing attackers to determine whether a user exists in the system or not. Attackers can leverage this information in further attacks, such as credential stuffing or targeted password brute-forcing. As of time of publication, no known patched versions are available.

Affected products

IceWhaleTech ZimaOS: before 1.2.5 — fixed in 1.2.5

How to fix

Upgrade to a fixed version: IceWhaleTech ZimaOS 1.2.5. Check the vendor advisory for mitigations.

References

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