Unrestricted Upload Vulnerability in Feelcrm-os by FeelEc-Yishu
CVE-2026-105389

5.3MEDIUM

Key Information:

Vendor

Feelec-yishu

Status
Feelcrm-os
Vendor
CVE Published:
5 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-105389?

A security flaw has been identified in the file UploadController.class.php of the UploadTicketFile Endpoint in Feelcrm-os version 1.0.0. This vulnerability enables unauthorized file uploads due to improper handling of the 'cmd' argument. The issue can be exploited remotely, allowing attackers to upload potentially malicious files, which could compromise the integrity and security of the affected system. The vulnerability has been publicly disclosed, but the vendor has not yet addressed it despite being notified through an issue report.

Affected Version(s)

feelcrm-os 1.0.0

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-2026-105389 - Proof of Concept

References

https://vuldb.com/vuln/413583
vdb-entrytechnical-description
https://vuldb.com/vuln/413583/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-105389
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

liaoxijun100 (VulDB User)
VulDB CNA Team
.