Unrestricted File Upload Vulnerability in Yonyou U8 Cloud Product
CVE-2025-12344

5.3MEDIUM

Key Information:

Vendor

Yonyou

Status
U8 Cloud
Vendor
CVE Published:
28 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-12344?

A vulnerability in Yonyou U8 Cloud enables attackers to exploit an unknown function within the /service/NCloudGatewayServlet component, allowing for unrestricted file uploads through manipulation of the 'ts/sign' argument. This flaw can be exploited remotely and poses a significant risk. Despite early warnings, the vendor has yet to address the issue publicly, which further exacerbates the potential for exploitation.

Affected Version(s)

U8 Cloud 2.0

U8 Cloud 2.1

U8 Cloud 2.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-12344 - Proof of Concept

References

https://vuldb.com/?id.330129
vdb-entrytechnical-description
https://vuldb.com/?ctiid.330129
signaturepermissions-required
https://vuldb.com/?submit.674532
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

IceSc0rpion (VulDB User)
JSON
.