CVE-2026-7044Public exploitNetwork attack vector

Authenticated code execution via unfiltered theme archives

Published Apr 26, 2026 · Updated Apr 26, 2026

Unrestricted file upload in GreenCMS 2.0 through 2.3 allows remote authenticated users to place dangerous files through theme addition. The themeadd handler accepts an uploaded archive without filtering its contents and automatically extracts embedded web shells into the web root. Access to theme management is required, and an extracted PHP web shell executes with the web server's privileges.

CVSS severity6.3
Medium
EPSS probability0.20%
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 GreenCMS 2.0 through 2.3 allows remote authenticated users to place dangerous files through theme addition. The themeadd handler accepts an uploaded archive without filtering its contents and automatically extracts embedded web shells into the web root. Access to theme management is required, and an extracted PHP web shell executes with the web server's privileges.

The record

CVE
CVE-2026-7044
Published
Apr 26, 2026
Updated
Apr 26, 2026
Vendor
GreenCMS
Product
GreenCMS
Classifications
CWE-434, CWE-284, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 26, 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=2.0
  2. Affected versionversion=2.1
  3. Affected versionversion=2.2
  4. Affected versionversion=2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GreenCMS · GreenCMSversion=2.0; version=2.1; version=2.2; version=2.3

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
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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