CVE-2026-54378 VitaFit Cloud API Broken Access Control via S3 Token Endpoint

CriticalCVSS 9.3

Published: 2026-11-05 00:09
Updated: 2026-11-09 18:56
Exploit status: No public exploit known

Description

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.

Affected products

Product	Affected versions	Fixed in
Shenzhen Shine Industrial Co., Ltd. VitaFit	< 2026-10-30	2026-10-30

References

Researcher Disclosure exploit technical-description
Google Play product
VulnCheck Advisory: VitaFit Cloud API Broken Access Control via S3 Token Endpoint third-party-advisory

CVSS v4.0

9.3 Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable System Confidentiality: High
Vulnerable System Integrity: High
Vulnerable System Availability: None
Subsequent System Confidentiality: High
Subsequent System Integrity: High
Subsequent System Availability: None

All scores (2)

v4.0 9.3 · vulncheck
v3.1 9.6 · vulncheck

Weakness & likelihood

EPSS (exploitation probability, 30 days): Not available
CWE: CWE-522 Insufficiently Protected Credentials

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

No public exploit references known.