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

> Unauthenticated attackers can upload arbitrary files, including JSP webshells, to achieve remote code execution on Yonyou KSOA servers.

- **Severity:** Critical 9.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Jul 2026
- **Updated:** 2 Jul 2026
- **Also known as:** GHSA-2pg7-g8qf-mcv3

## What is CVE-2022-50973?

CVE-2022-50973 is a critical vulnerability in Yonyou Network Technology Co., Ltd. KSOA, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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).

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2022-50973?


## How do I fix CVE-2022-50973?

No fix has been published for CVE-2022-50973 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-50973 being exploited?

There is no known exploitation of CVE-2022-50973 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-50973 and fix it if it is affected.

What it is: CVE-2022-50973 is a critical vulnerability in Yonyou Network Technology Co., Ltd. KSOA, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-50973 in the wild and no public exploit code.

Affected product: Yonyou Network Technology Co., Ltd. KSOA. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-50973/ (Markdown: https://insights.sbomify.com/CVE-2022-50973/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-50973
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-50973
- OSV: https://osv.dev/vulnerability/CVE-2022-50973

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-50973/
Summaries are generated and may contain mistakes; the official description above is the record.