CVE-2020-11065 : What You Need to Know

In TYPO3 CMS versions greater than or equal to 9.5.12 and less than 9.5.17, as well as versions greater than or equal to 10.2.0 and less than 10.4.2, a vulnerability has been identified in the typolink functionality, allowing for cross-site scripting attacks through improperly parsed HTML attributes. The issue has been resolved in versions 9.5.17 and 10.4.2.

Understanding CVE-2020-11065

This CVE pertains to a cross-site scripting vulnerability in TYPO3 CMS.

What is CVE-2020-11065?

CVE-2020-11065 is a security vulnerability in TYPO3 CMS that allows attackers to execute malicious scripts on the victim's browser, potentially compromising user data and system integrity.

The Impact of CVE-2020-11065

The vulnerability poses a medium severity risk with a CVSS base score of 5.4. It requires user interaction and can lead to unauthorized access, data manipulation, and potential information disclosure.

Technical Details of CVE-2020-11065

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability arises from the improper parsing of HTML attributes in link tags generated by the typolink functionality in affected TYPO3 CMS versions.

Affected Systems and Versions

TYPO3 CMS versions >= 9.5.12, < 9.5.17
TYPO3 CMS versions >= 10.2.0, < 10.4.2

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into link tags, taking advantage of the incorrect parsing of HTML attributes to execute cross-site scripting attacks.

Mitigation and Prevention

Protecting systems from CVE-2020-11065 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update TYPO3 CMS to version 9.5.17 or 10.4.2, where the vulnerability has been patched.
Educate users about the risks of clicking on suspicious links to prevent exploitation.

Long-Term Security Practices

Regularly monitor and update CMS software to address security vulnerabilities promptly.
Implement content security policies to mitigate the impact of cross-site scripting attacks.

Patching and Updates

Apply security patches provided by TYPO3 promptly to ensure protection against known vulnerabilities.