Unrestricted File Upload Vulnerability in light0011 CMS by Light0011
CVE-2026-86305

6.9MEDIUM

Key Information:

Vendor

Light0011

Status
Cms
Vendor
CVE Published:
7 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86305?

A significant vulnerability has been identified in the light0011 CMS, specifically within the Upload::upload function of the ThinkPHP library. This weakness permits unauthorized users to upload files without proper restrictions, potentially leading to unauthorized code execution. The flaw can be exploited remotely, increasing the risk as it could be used by an attacker to compromise the web application and potentially the underlying server. This issue was reported to the developers, but there has been no official response or patch available, leaving users vulnerable to potential attacks.

Affected Version(s)

cms c774dce31c6df0055568a8d5c53d964d99be199d

cms f72cf46f601efb2a0618c3814cc2f61380b38930

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-2026-86305 - Proof of Concept

References

https://vuldb.com/vuln/399478
vdb-entrytechnical-description
https://vuldb.com/vuln/399478/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86305
third-party-advisory

CVSS V4

Score:
6.9
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

JiuZer0 (VulDB User)
VulDB CNA Team
.