Backdoor Vulnerability in PHPStudy Affects Multiple Versions
CVE-2025-34061
Key Information:
- Status
- Vendor
- CVE Published:
- 3 July 2025
Badges
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.
References
CVSS V4
Timeline
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved