Yonyou Network KSOA 9.0 ImageUpload Servlet filename unrestricted upload

Summaryinfo

A vulnerability identified as critical has been detected in Yonyou Network KSOA 9.0. Affected is an unknown function of the component ImageUpload Servlet. This manipulation of the argument filename causes unrestricted upload. The identification of this vulnerability is CVE-2022-50973. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Yonyou Network KSOA 9.0 and classified as critical. Affected by this vulnerability is some unknown functionality of the component ImageUpload Servlet. The manipulation of the argument filename with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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).

It is possible to read the advisory at cn-sec.com. This vulnerability is known as CVE-2022-50973 since 01/11/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/02/2026). The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Yonyou Network

Name

• KSOA

Version

• 9.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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CVSSv3info

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Entryinfo

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