CVE-2022-4995Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via two-stage JSP upload

Published Aug 7, 2026 · Updated Aug 7, 2026

Unrestricted file upload in Weaver e-cology 9.0 before 10.52 allows remote attackers to execute code through crafted POST requests. uploaderOperate.jsp stores attacker-supplied Filedata in the ImageFile table without rejecting JSP content, and OfficeServer's INSERTIMAGE path writes the selected record under the web root. No credentials or user interaction are required, and the resulting webshell runs with the application server process's privileges.

CVSS severity9.3
Critical
EPSS probability0.69%
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 Weaver e-cology 9.0 before 10.52 allows remote attackers to execute code through crafted POST requests. uploaderOperate.jsp stores attacker-supplied Filedata in the ImageFile table without rejecting JSP content, and OfficeServer's INSERTIMAGE path writes the selected record under the web root. No credentials or user interaction are required, and the resulting webshell runs with the application server process's privileges.

The record

CVE
CVE-2022-4995
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
Weaver Network Technology Co., Ltd.
Product
e-cology
Classifications
CWE-434, T1505.003, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 14, 2023Exploitation reportedShadowserver exploitation observation
  2. Aug 7, 2026CVE publishedPublication date reported by the CVE source.
  3. Aug 7, 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=0 <10.52

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Weaver Network Technology Co., Ltd. · e-cologyversion=0 <10.52

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
T1505.003Server Software Component: Web Shell
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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