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CVE-2025-48200: TYPO3 sr_feuser_register Extension Vulnerability Leading to Remote Code Execution

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Overview

In this blog post, we delve into the details of a critical vulnerability, CVE-2025-48200, that affects the TYPO3 content management system (CMS). The vulnerability lies in the sr_feuser_register extension (up to version 12.4.8), and it permits remote code execution. TYPO3 is a widely used open-source CMS with a vast global community. Therefore, this vulnerability is of significant concern as it has the potential to impact numerous websites and applications, leading to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-48200
Severity: Critical (10.0 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

TYPO3 sr_feuser_register extension | Up to version 12.4.8

How the Exploit Works

The sr_feuser_register extension for TYPO3 is vulnerable to remote code execution. This vulnerability stems from a lack of proper input validation in the extension’s code, which allows an attacker to inject malicious code. The attacker can leverage this vulnerability to execute arbitrary code on the server, thereby compromising the system. The code execution occurs with the privileges of the server process running TYPO3. This breach can potentially lead to sensitive data exposure, unauthorized system access, or even control of the entire system.

Conceptual Example Code

The following is a conceptual example of how this vulnerability might be exploited. Here, the attacker crafts a malicious payload in the form of an HTTP POST request to a vulnerable endpoint on the TYPO3 server.

POST /typo3/sr_feuser_register HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "user_data": "{'; system('rm -rf /'); #}" }

In this example, the attacker injects code into the user_data parameter. The injected code is executed on the server, leading to a devastating outcome. Please note that this is a conceptual example, and actual exploit code may differ based on the server’s configuration and the attacker’s intent.

Mitigation Guidance

The most effective mitigation for this vulnerability is to apply the patch provided by the vendor. TYPO3 has released a patched version of the sr_feuser_register extension that fixes this vulnerability. Users are strongly encouraged to update to the latest version as soon as possible.
In case immediate patching is not possible, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. These systems should be configured to detect and block attempts to exploit this vulnerability. However, these are just temporary measures and cannot substitute a proper patch.
Remember, staying updated is the most effective defense against such vulnerabilities. Regularly patch and update your systems to keep them secure.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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