# CVE-2022-50973: Yonyou KSOA arbitrary file upload in ImageUpload servlet

Source: https://junglewise.ai/threats/cve-2022-50973-yonyou-ksoa-arbitrary-file-upload-in-imageupload-servlet  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-02. Updated: 2026-07-02  
License: CC BY 4.0 with a link back

CVE-2022-50973 · Severity: critical · CVSS 9.8 · Published 2026-07-02

Yonyou KSOA, a business management software platform, contains a critical security flaw in its image upload component. An unauthorized attacker can exploit this to upload malicious files directly to the server without needing a username or password. If successful, this allows the attacker to take complete control of the system, potentially leading to data theft, service disruption, or further attacks on the corporate network.

Technologies: [Yonyou KSOA](https://junglewise.ai/threats/technologies/ksoa). Vendors: [Yonyou](https://junglewise.ai/threats/vendors/yonyou).

## Quick answers

**Is CVE-2022-50973 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2022-50973 being exploited in the wild.

**How severe is CVE-2022-50973?** Critical severity, with a CVSS score of 9.8, published 2 July 2026.

**Which products and versions are affected?** Yonyou KSOA 9.0.

**Is there a fix for CVE-2022-50973?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2022-50973 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2022-50973?** Check whether you run Yonyou KSOA at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An unrestricted file upload vulnerability exists in the 'com.sksoft.bill.ImageUpload' servlet of Yonyou KSOA 9.0. The component fails to perform authentication or validate file types, extensions, and content for POST requests. An attacker can leverage the 'filepath' and 'filename' parameters to upload a JSP webshell to the web root (typically under the /pictures/ directory). Once uploaded, the malicious script can be executed by the web server, resulting in unauthenticated remote code execution (RCE) with the privileges of the web service. Evidence of active exploitation was reported as early as November 2023.

## Affected products

- Yonyou Network Technology Co., Ltd. KSOA 9.0

## Timeline

- 2023-11-07: exploited: Exploitation evidence first observed by Shadowserver Foundation.
- 2026-07-02: advisory: NVD/VulnCheck advisory published.

## References

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

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