#VU109804 Arbitrary file upload in youkefu - CVE-2025-3381

Vulnerability identifier: #VU109804

Vulnerability risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-3381

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
youkefu
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: zhangyanbo2007

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload  in WebIMController.java. A remote user can upload a malicious file and execute it on the server.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

youkefu: 4.2.0

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External links
https://github.com/mapl3miss/uckefuVul/blob/main/uckefu-upload.md
https://vuldb.com/?ctiid.303627
https://vuldb.com/?id.303627
https://vuldb.com/?submit.552369

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.