CVE-2021-41113 : Security Advisory and Response
Learn about CVE-2021-41113 affecting TYPO3 v11. Immediate update to version 11.5.0 recommended. Understand the impact, mitigation steps, and long-term prevention strategies.
TYPO3, an open-source PHP-based web content management system, version 11.2.0 up to but not including 11.5.0, is vulnerable to Cross-Site Request Forgery (CSRF) attacks.
Understanding CVE-2021-41113
TYPO3 v11's feature for creating and sharing deep links in the backend UI exposes a CSRF vulnerability, allowing unauthenticated attackers to compromise systems.
What is CVE-2021-41113?
- TYPO3 v11 feature susceptible to CSRF attacks
- Attackers can create admin accounts to compromise systems without authentication
- Victims with active sessions on TYPO3 backend are targeted
The Impact of CVE-2021-41113
- CVSS v3.1 Base Score: 8.8 (High Severity)
- Attack Complexity: Low
- Attack Vector: Network
- Confidentiality, Integrity, and Availability Impact: High
- User Interaction Required
Technical Details of CVE-2021-41113
TYPO3 vulnerability details and affected systems.
Vulnerability Description
- CSRF vulnerability due to backend URI handling in TYPO3 v11
- Attackers can trick victims to access compromised systems
Affected Systems and Versions
- TYPO3 versions from 11.2.0 to 11.5.0
Exploitation Mechanism
- Attackers exploit the CSRF vulnerability in the backend URI handling
Mitigation and Prevention
Measures to mitigate the CVE-2021-41113 vulnerability.
Immediate Steps to Take
- Update TYPO3 instance to version 11.5.0
- Ensure Same-Site cookie settings prevent malicious invocations
Long-Term Security Practices
- Educate users on phishing prevention
- Regular security awareness training
Patching and Updates
- Apply security patches promptly to prevent CSRF attacks