CVE-2022-50973Known exploitationPublic exploitNetwork attack vector

Unauthenticated RCE via unrestricted JSP upload

Published Jul 2, 2026 · Updated Jul 2, 2026

Unrestricted file upload in Yonyou KSOA 9.0 allows remote attackers to execute code by uploading a JSP webshell. The com.sksoft.bill.ImageUpload servlet writes attacker-controlled content and filename input beneath the web-served pictures directory without authentication or file validation. Network access to the servlet is sufficient, and requesting the uploaded JSP executes its code with the web server's privileges.

CVSS severity9.3
Critical
EPSS probability1.52%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Yonyou KSOA 9.0 allows remote attackers to execute code by uploading a JSP webshell. The com.sksoft.bill.ImageUpload servlet writes attacker-controlled content and filename input beneath the web-served pictures directory without authentication or file validation. Network access to the servlet is sufficient, and requesting the uploaded JSP executes its code with the web server's privileges.

The record

CVE
CVE-2022-50973
Published
Jul 2, 2026
Updated
Jul 2, 2026
Vendor
Yonyou Network Technology Co., Ltd.
Product
KSOA
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2023Exploitation reportedShadowserver honeypot exploitation observation
  2. Jul 2, 2026CVE publishedPublication date reported by the CVE source.
  3. Jul 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Yonyou Network Technology Co., Ltd. · KSOAversion=9.0

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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