CVE-2026-7044 — GreenCMS Unrestricted File Upload

April 27, 2026 01:17 /MEDIUM /CVSS 6.3/10

Written by SCW Vulnerability Desk Vulnerability Intelligence

National Vulnerability Database vulnerabilitycvemedium-severityunrestricted-file-uploadcwe-284cwe-434

CVE-2026-7044 — GreenCMS Unrestricted File Upload

CVE-2026-7044 — A vulnerability was found in GreenCMS up to 2.3. Affected is the function themeadd of the file /index.php?m=admin&c=custom&a=themeadd. The manipulation results in unrestricted upload. The attack can be launched remotely. The exploit has been made public and could be used. This vulner

What This Means For You

If your environment is affected by CWE-284, CWE-434, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-7044 updates and patches.

Related ATT&CK Techniques

T1190 Exploit Public-Facing Application Initial Access T1505.003 Server Component: Web Shell Persistence

🛡️ Detection Rules

3 rules · 6 SIEM formats

3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.

critical T1190 Initial Access

CVE-2026-7044 - GreenCMS Unrestricted File Upload via themeadd

Sigma YAML — free preview

title: CVE-2026-7044 - GreenCMS Unrestricted File Upload via themeadd
id: scw-2026-04-26-ai-1
status: experimental
level: critical
description: |
  Detects the specific URI query parameter and POST method used to exploit the unrestricted file upload vulnerability in GreenCMS (CVE-2026-7044) via the themeadd function. This is a critical initial access vector.
author: SCW Feed Engine (AI-generated)
date: 2026-04-26
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7044/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri-query|contains:
          - '?m=admin&c=custom&a=themeadd'
      cs-method|exact:
          - 'POST'
      sc-status|exact:
          - '200'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse

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Indicators of Compromise

ID	Type	Indicator
CVE-2026-7044	vulnerability	CVE-2026-7044
CWE-284	weakness	CWE-284
CWE-434	weakness	CWE-434

Written by SCW Vulnerability Desk

Source & Attribution

Source Platform	NVD
Channel	National Vulnerability Database
Published	April 27, 2026 at 01:17 UTC

This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.

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