CVE-2025-34061 PHPStudy 2016-2018 Backdoor Remote Code Execution Vulnerability
Unauthenticated attackers can execute arbitrary PHP code via a backdoor in PHPStudy, compromising the web server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34061?
CVE-2025-34061 is a critical code injection vulnerability in Henan Xiaopi Security Technology Co., Ltd. PHPStudy, published on 3 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A backdoor in PHPStudy versions 2016 through 2018 allows unauthenticated remote attackers to execute arbitrary PHP code on affected installations. The backdoor listens for base64-encoded PHP payloads in the Accept-Charset HTTP header of incoming requests, decodes and executes the payload without proper validation. This leads to remote code execution as the web server user, compromising the affected system.
Weakness: CWE-94
Which versions are affected by CVE-2025-34061?
How do I fix CVE-2025-34061?
No fix has been published for CVE-2025-34061 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-34061 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34061 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-2mv3-3vpm-p5pm.