CVE-2022-31943Public exploitNetwork attack vector

Remote code execution via ZIP template extraction

Published Jul 1, 2022 · Updated Aug 3, 2024

Unrestricted file upload in Mingsoft MCMS 5.2.8 allows remote attackers to execute server-side code through a crafted ZIP archive. The article-thumbnail upload accepts ZIP files because its denylist blocks only EXE, JSP, JSPX, and SH extensions, and TemplateAction then extracts an embedded JSP into a web-accessible path. No authentication or user interaction is required; completing the upload and extraction chain creates a reachable web shell with server-process privileges.

CVSS severity9.8
Critical
EPSS probability1.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Mingsoft MCMS 5.2.8 allows remote attackers to execute server-side code through a crafted ZIP archive. The article-thumbnail upload accepts ZIP files because its denylist blocks only EXE, JSP, JSPX, and SH extensions, and TemplateAction then extracts an embedded JSP into a web-accessible path. No authentication or user interaction is required; completing the upload and extraction chain creates a reachable web shell with server-process privileges.

The record

CVE
CVE-2022-31943
Published
Jul 1, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS: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 exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

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

Technologies

Your stack

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Your stack

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