Unrestricted File Upload Vulnerability in Kaseya KServer
CVE-2013-10034

9.3CRITICAL

Key Information:

Vendor

Kaseya

Status
Kserver
Vendor
CVE Published:
31 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2013-10034?

A significant vulnerability exists in Kaseya KServer that allows unauthenticated users to upload files to arbitrary directories through the uploadImage.asp endpoint. This flaw arises from inadequate input validation and authentication checks, permitting an attacker to upload a crafted file with an .asp extension. Once successfully uploaded, such files can be executed, potentially leading to arbitrary code execution with the privileges of the IUSR account. The issue was addressed in version 6.3.0.2 by eliminating the vulnerable endpoint.

Affected Version(s)

KServer * < 6.3.0.2

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-2013-10034 - Proof of Concept

CVE-2013-10034 - Proof of Concept

CVE-2013-10034 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://web.archive.org/web/20150210113922/http://securit...
third-party-advisorytechnical-descriptionexploit
https://www.exploit-db.com/exploits/29675
exploit

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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

Thomas Hibbert of Security-Assessment.com
.
CVE-2013-10034 : Unrestricted File Upload Vulnerability in Kaseya KServer