CVE-2025-50707: Critical Remote Code Execution Vulnerability in thinkphp3 v.3.2.5

Overview

The CVE-2025-50707 vulnerability exists in thinkphp3 v.3.2.5, an open-source PHP framework. This critical vulnerability allows a remote attacker to execute arbitrary code via a flaw in the index.php component. As the vulnerability could potentially lead to system compromises and data leakage, it is of significant concern to any organization using this version of the software. The ability of an attacker to remotely execute arbitrary code is a severe threat, as it essentially grants them the same permissions as the system’s legitimate users.

Vulnerability Summary

CVE ID: CVE-2025-50707
Severity: Critical – CVSS: 9.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, potential data leakage

Affected Products

Product | Affected Versions

thinkphp3 | v.3.2.5

How the Exploit Works

The vulnerability resides in the index.php component of thinkphp3 v3.2.5. An attacker can exploit this flaw by sending a maliciously crafted HTTP request to the server. The server, lacking proper sanitization checks, interprets this request as legitimate code and executes it. This allows the attacker to run arbitrary code on the server, leading to potential system compromise or data leakage.

Conceptual Example Code

Here’s an example of how an attacker might exploit this vulnerability:

POST /index.php HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
data={ "payload": "arbitrary_code_here" }

In the above example, arbitrary_code_here represents the code that the attacker wants the server to execute. Since the server lacks proper input validation, it blindly executes the code, thereby giving the attacker control over the system.

Mitigation and Prevention

As a mitigation strategy against this critical vulnerability, vendors are advised to apply the patch provided by the vendor as soon as possible. Until the patch can be applied, a temporary mitigation measure can be to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS). Both of these solutions can help identify and block malicious requests, thus providing a layer of protection against this vulnerability. However, these should only be seen as temporary measures, and the patch should be applied as soon as it is available to ensure complete protection.