Unrestricted File Upload Vulnerability in Z-BlogPHP 1.7.5
CVE-2026-6650

5.1MEDIUM

Key Information:

Vendor

Z-Blog

Status
Z-blogPHP
Vendor
CVE Published:
20 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6650?

A vulnerability has been identified in Z-BlogPHP version 1.7.5, specifically in the App::UnPack function within the app_upload.php file of the ZBA File Handler component. This flaw permits an attacker to upload files without any restriction, which can lead to serious security breaches. The vulnerability can be exploited remotely, and public exploits exist. Despite early disclosure attempts to the vendor, there has been no response regarding mitigation measures.

Affected Version(s)

Z-BlogPHP 1.7.5

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-2026-6650 - Proof of Concept

References

https://vuldb.com/vuln/358284
vdb-entrytechnical-description
https://vuldb.com/vuln/358284/cti
signaturepermissions-required
https://vuldb.com/submit/793451
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
.