Unrestricted File Upload Vulnerability in GreenCMS by GreenCMS
CVE-2026-7044

5.3MEDIUM

Key Information:

Vendor

GreenCMS

Status
Greencms
Vendor
CVE Published:
26 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7044?

A vulnerability exists in versions of GreenCMS up to 2.3 that allows attackers to exploit the 'themeadd' function via the /index.php?m=admin&c=custom&a=themeadd endpoint. This flaw permits unrestricted file uploads, enabling remote attackers to upload malicious files without proper authorization. The issue primarily affects unsupported products, increasing the risk of exploitation. It's crucial for users of affected versions to be aware of this vulnerability and take necessary precautions to secure their systems.

Affected Version(s)

GreenCMS 2.0

GreenCMS 2.1

GreenCMS 2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-7044 - Proof of Concept

References

https://vuldb.com/vuln/359623
vdb-entrytechnical-description
https://vuldb.com/vuln/359623/cti
signaturepermissions-required
https://vuldb.com/submit/798530
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

R21Z20 (VulDB User)
.