CVE-2022-23503 : Security Advisory and Response

TYPO3 is an open-source PHP-based web content management system that was found to be vulnerable to Arbitrary Code Execution via Form Framework. This CVE, assigned by GitHub, has a base severity rating of HIGH with a CVSS base score of 7.5.

Understanding CVE-2022-23503

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2022-23503?

TYPO3 versions prior to 8.7.49, 9.5.38, 10.4.33, 11.5.20, and 12.1.1 are susceptible to Code Injection. This arises due to the improper handling of user-submitted data in the Form Designer backend module, allowing malicious code injection that can be executed as PHP via TypoScript.

The Impact of CVE-2022-23503

Exploiting this vulnerability requires specific TypoScript instructions for a form item and a valid backend user account with access to the form module. Attackers could leverage this to execute arbitrary code on the server, potentially leading to data breaches and system compromise.

Technical Details of CVE-2022-23503

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw in TYPO3 stems from the lack of proper segregation between user-supplied data and internal configurations, enabling threat actors to inject and execute malicious code via TypoScript.

Affected Systems and Versions

TYPO3 versions ranging from 8.0.0 to 12.1.1 are impacted by this vulnerability, with versions below 8.7.49, 9.5.38, 10.4.33, 11.5.20, and 12.1.1 being at risk of exploitation.

Exploitation Mechanism

To exploit this vulnerability, attackers need specific TypoScript instructions for a form item and authorized access to the form module, allowing them to execute arbitrary code on the server.

Mitigation and Prevention

Here are the steps to mitigate the risks posed by CVE-2022-23503.

Immediate Steps to Take

Users are advised to update their TYPO3 installations to the patched versions (8.7.49 ELTS, 9.5.38 ELTS, 10.4.33, 11.5.20, 12.1.1) to address this vulnerability and prevent potential exploitation.

Long-Term Security Practices

Enforcing secure coding practices, regular security audits, and maintaining least privilege access can help enhance the overall security posture of web applications like TYPO3.

Patching and Updates

Stay informed about security advisories and promptly apply patches and updates released by TYPO3 to protect your systems from known vulnerabilities.