CVE-2021-32669 : Exploit Details and Defense Strategies
Discover the cross-site scripting vulnerability in TYPO3.CMS versions 9.0.0 to 9.5.28, 10.0.0 to 10.4.17, and 11.0.0 to 11.3.0. Learn about impacts, affected systems, exploitation, and mitigation.
A cross-site scripting vulnerability has been identified in TYPO3.CMS versions 9.0.0 to 9.5.28, 10.0.0 to 10.4.17, and 11.0.0 to 11.3.0. This vulnerability in the backend grid view could allow for persistent cross-site scripting if backend layouts settings are not encoded properly, requiring a valid backend user account for exploitation. TYPO3 versions 9.5.29, 10.4.18, and 11.3.1 include patches for this security issue.
Understanding CVE-2021-32669
This section delves into the details of CVE-2021-32669.
What is CVE-2021-32669?
CVE-2021-32669 refers to a cross-site scripting vulnerability found in TYPO3.CMS, exposing versions 9.0.0 to 9.5.28, 10.0.0 to 10.4.17, and 11.0.0 to 11.3.0 to potential exploitation.
The Impact of CVE-2021-32669
The impact of this vulnerability includes a medium severity base score of 6.4. It poses a risk to confidentiality and integrity, requiring low privileges for exploitation.
Technical Details of CVE-2021-32669
In this section, we explore the technical aspects of CVE-2021-32669.
Vulnerability Description
The vulnerability arises due to inadequate encoding of backend layouts settings, making the grid view susceptible to persistent cross-site scripting attacks.
Affected Systems and Versions
TYPO3.CMS versions 9.0.0 through 9.5.28, 10.0.0 through 10.4.17, and 11.0.0 through 11.3.0 are affected by this vulnerability.
Exploitation Mechanism
To exploit this vulnerability, an attacker would require a valid backend user account.
Mitigation and Prevention
Mitigate the risks associated with CVE-2021-32669 by following the steps outlined below.
Immediate Steps to Take
Users are advised to update their TYPO3 installations to versions 9.5.29, 10.4.18, or 11.3.1, which contain patches for this vulnerability.
Long-Term Security Practices
Implement secure coding practices and conduct regular security audits to identify and address vulnerabilities promptly.
Patching and Updates
Stay informed about security advisories and promptly apply patches and updates to ensure the security of your TYPO3.CMS installation.