CVE-2023-54398
Yonyou U8 Cloud Java Deserialization RCE via FileManageServlet
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction method, which passes raw HTTP request body data directly to ObjectInputStream.readObject() without filtering, to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-02-13.
| CWE | CWE-502 |
| Vendor | yonyou |
| Product | u8 cloud |
| Published | Sep 15, 2026 |
| Last Updated | Sep 15, 2026 |
Stay Ahead of the Next One
Get instant alerts for yonyou u8 cloud
Be the first to know when new critical vulnerabilities affecting yonyou u8 cloud are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Yonyou / U8 Cloud
1.0 2.0 2.1 2.3 2.5 2.6 2.65 2.7 3.0 3.1 3.2 3.5 3.6 3.6sp
References
security.yonyou.com: https://security.yonyou.com/#/noticeInfo?id=400 cn-sec.com: https://cn-sec.com/archives/2182384.html blog.csdn.net: https://blog.csdn.net/qq_41904294/article/details/134277353 avd.aliyun.com: https://avd.aliyun.com/detail?id=AVD-2023-1686894 yonyou.com: https://www.yonyou.com/Global/ vulncheck.com: https://www.vulncheck.com/advisories/yonyou-u8-cloud-java-deserialization-rce-via-filemanageservlet
Credits
🔍 The Shadowserver Foundation