CVE-2022-50973

CRITICAL 9.8

Yonyou KSOA 9.0 Unauthenticated File Upload RCE via ImageUpload Servlet

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Yonyou KSOA 9.0 contains an unauthenticated arbitrary file upload vulnerability in the com.sksoft.bill.ImageUpload servlet that allows unauthenticated attackers to upload arbitrary files by submitting a POST request with attacker-controlled filepath and filename parameters without any authentication, file type, extension, or content validation. Attackers can upload a JSP webshell by specifying a malicious filename and root filepath, with the uploaded file stored under the pictures directory and directly executed by the web server, resulting in unauthenticated remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-11-07 (UTC).

CWE	CWE-434
Vendor	yonyou network technology co., ltd.
Product	ksoa
Published	Jul 2, 2026
Last Updated	Jul 2, 2026

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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 Network Technology Co., Ltd. / KSOA

9.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cn-sec.com: https://cn-sec.com/archives/1329088.html buaq.net: https://buaq.net/go-167023.html cnblogs.com: https://www.cnblogs.com/yang-miemie/p/17714927.html yonyou.com: https://www.yonyou.com/ vulncheck.com: https://www.vulncheck.com/advisories/yonyou-ksoa-unauthenticated-file-upload-rce-via-imageupload-servlet

Credits

🔍 The Shadowserver Foundation