Backdoor Vulnerability in PHPStudy Affects Multiple Versions
CVE-2025-34061

9.3CRITICAL

Key Information:

Vendor

Henan Xiaopi Security Technology Co., Ltd.

Status
PHPstudy
Vendor
CVE Published:
3 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-34061?

A backdoor has been identified in PHPStudy versions 2016 through 2018, enabling unauthenticated remote attackers to execute arbitrary PHP code on compromised systems. This backdoor listens for malicious base64-encoded PHP payloads sent in the Accept-Charset HTTP header of incoming requests. Upon receipt, it decodes and executes these payloads without proper validation, exposing the web server to significant security risks and allowing attackers to execute commands as the web server user. This exploit emphasizes the importance of securing PHPStudy installations to prevent unauthorized access.

Affected Version(s)

PHPStudy 2016 <= 2018

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-2025-34061 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.xp.cn/phpstudy
product

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

Dimensional
.