Remote PHP Code Execution Vulnerability in InstantCMS Web Application
CVE-2013-10051

9.3CRITICAL

Key Information:

Vendor

Instantcms

Status
Instantcms
Vendor
CVE Published:
1 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2013-10051?

A remote PHP code execution flaw exists in InstantCMS due to improper handling of user input in the search view handler. The vulnerability arises from using the eval() function with concatenated user-supplied data without sufficient sanitation. An attacker can exploit this weakness by sending a specially crafted HTTP GET request containing a base64-encoded payload in the Cmd header. This exploitation can lead to arbitrary code being executed on the web server, which poses significant risks to the security and integrity of the affected web application.

Affected Version(s)

InstantCMS * <= 1.6

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-2013-10051 - Proof of Concept

CVE-2013-10051 - Proof of Concept

CVE-2013-10051 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.exploit-db.com/exploits/26622
exploit
https://packetstorm.news/files/id/122176
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

Ricardo Jorge Borges de Almeida
.
CVE-2013-10051 : Remote PHP Code Execution Vulnerability in InstantCMS Web Application