CVE-2026-54378

CRITICAL 9.6

VitaFit Cloud API Broken Access Control via S3 Token Endpoint

CVSS Score

9.6

EPSS Score

0.0%

EPSS Percentile

0th

VitaFit cloud API before 2026-10-30 contained a broken access control vulnerability that allows any authenticated user to obtain temporary AWS credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can use these improperly scoped credentials to list the shared storage bucket and read or overwrite other users' stored files, enabling unauthorized cross-user data access and manipulation.

CWE	CWE-522
Vendor	shenzhen shine industrial co., ltd.
Product	vitafit
Published	Nov 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Shenzhen Shine Industrial Co., Ltd. / VitaFit

0 < 2026-10-30

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/je-lv/vitafit-security-research play.google.com: https://play.google.com/store/apps/details?id=com.vt.vitafit vulncheck.com: https://www.vulncheck.com/advisories/vitafit-cloud-api-broken-access-control-via-s3-token-endpoint

Credits

Jose Lomeli