CVE-2021-32768 : Security Advisory and Response
Learn about CVE-2021-32768, a cross-site scripting vulnerability in TYPO3.CMS versions >= 7.0.0, < 11.3.2. Update to fixed versions to prevent malicious script execution.
TYPO3.CMS versions >= 7.0.0, < 11.3.2 are affected by a cross-site scripting vulnerability due to improper parsing of rich-text content. Attackers can exploit this to execute malicious scripts on the website.
Understanding CVE-2021-32768
This vulnerability in TYPO3.CMS allows attackers to execute malicious scripts through rich-text content, potentially leading to cross-site scripting attacks.
What is CVE-2021-32768?
TYPO3.CMS is an open-source web content management system that fails to properly sanitize rich-text content, leaving the frontend vulnerable to cross-site scripting. Attackers can execute scripts by exploiting this issue.
The Impact of CVE-2021-32768
The vulnerability in TYPO3.CMS versions >= 7.0.0, < 11.3.2 can lead to cross-site scripting attacks, compromising the integrity of the website and potentially executing malicious code.
Technical Details of CVE-2021-32768
In default scenarios, exploitation requires a valid backend user account. However, if custom plugins reflect rich-text content submitted by users, authentication is not needed.
Vulnerability Description
TYPO3.CMS fails to properly parse, sanitize, and encode rich-text content, allowing attackers to execute malicious scripts.
Affected Systems and Versions
Versions >= 7.0.0, < 11.3.2 of TYPO3.CMS are affected by this cross-site scripting vulnerability.
Exploitation Mechanism
By submitting malicious rich-text content through custom plugins, attackers can exploit this vulnerability without authentication.
Mitigation and Prevention
To address CVE-2021-32768, users should update their TYPO3.CMS installations to versions 7.6.53 ELTS, 8.7.42 ELTS, 9.5.29, 10.4.19, or 11.3.2 to patch the vulnerability.
Immediate Steps to Take
Update TYPO3.CMS to the latest fixed versions to prevent exploitation of this vulnerability.
Long-Term Security Practices
Regularly update TYPO3.CMS and implement secure coding practices to mitigate future security risks.
Patching and Updates
Apply security patches and updates provided by TYPO3 to ensure the ongoing security of your web content management system.