Unrestricted File Upload Vulnerability in FeehiCMS UEditor Widget by liufee
CVE-2026-86239

6.9MEDIUM

Key Information:

Vendor

Liufee

Status
Feehicms
Vendor
CVE Published:
7 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86239?

A vulnerability has been discovered in the UEditor Widget component of FeehiCMS, specifically in the function UeditorAction::init within the file backend/widgets/ueditor/UeditorAction.php. This flaw allows for unrestricted file uploads, which could be exploited by remote attackers to upload malicious files, potentially leading to further compromise of the affected system. Despite being reported early, the vendor has yet to address this issue.

Affected Version(s)

FeehiCMS 2.1.0

FeehiCMS 2.1.1

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-2026-86239 - Proof of Concept

References

https://vuldb.com/vuln/399396
vdb-entrytechnical-description
https://vuldb.com/vuln/399396/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86239
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
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

lyang (VulDB User)
VulDB CNA Team
.