CVE-2026-54378

CRITICAL
INFO Priority: 0.02 BB Relevance: 69/100
Published: 2026-11-04 Modified: 2026-11-09 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
AT: None
VC: High
VI: High
VA: None

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
Shenzhen Shine Industrial Co., Ltd. VitaFit 0 < 2026-10-30
Shenzhen Shine Industrial Co., Ltd. VitaFit 0 < 2026-10-30

Bug Bounty Relevance

69 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

9.3 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.23%
Raw Score 0.002310
Percentile 14.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00231
2026-11-12
0.00231
2026-11-10
0.00231
2026-11-09
0.00231
2026-11-08
0.00231
2026-11-07
0.00231
2026-11-06
0.00231
2026-11-05
0.00231

Intelligence Sources

mitre ref →
nvd ref →