Unrestricted Upload Vulnerability in MacCMS Pro by MacCMS
CVE-2026-7578

5.1MEDIUM

Key Information:

Vendor

MacCMS

Status
Maccms Pro
Vendor
CVE Published:
1 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7578?

A vulnerability has been identified in MacCMS Pro, specifically affecting the Plugin Installation Handler's 'install' function. This weakness allows for unrestricted file uploads via manipulation of the '/admi.php/admin/addon/add.html' file. Attackers can exploit this vulnerability to upload any file remotely, potentially leading to unauthorized access and system compromises. The exploit details have been publicly shared, and attempts to notify the vendor have gone unanswered.

Affected Version(s)

MacCMS Pro 2022.1.0

MacCMS Pro 2022.1.1

MacCMS Pro 2022.1.2

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-2026-7578 - Proof of Concept

References

https://vuldb.com/vuln/360419
vdb-entrytechnical-description
https://vuldb.com/vuln/360419/cti
signaturepermissions-required
https://vuldb.com/submit/792283
third-party-advisory

CVSS V4

Score:
5.1
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

qingyunsec (VulDB User)
VulDB CNA Team
.