CVE-2021-41169 : Exploit Details and Defense Strategies
Learn about CVE-2021-41169 affecting Sulu, an open-source PHP content management system. Find out the impact, affected versions, and mitigation steps for this vulnerability.
Sulu is an open-source PHP content management system based on the Symfony framework. In versions before 1.6.43, it is susceptible to stored cross-site scripting attacks due to improper neutralization of HTML input into Tag names.
Understanding CVE-2021-41169
What is CVE-2021-41169?
Sulu, an open-source PHP content management system, has a vulnerability in versions prior to 1.6.43 that allows for stored cross-site scripting attacks.
The Impact of CVE-2021-41169
This vulnerability can lead to high confidentiality impact and requires high privileges from users for exploitation. The attack complexity is low, with required user interaction.
Technical Details of CVE-2021-41169
Vulnerability Description
The issue arises from the improper sanitization of HTML input into Tag names, enabling stored cross-site scripting attacks.
Affected Systems and Versions
- Product: Sulu
- Vendor: Sulu
- Vulnerable Version: < 1.6.43
Exploitation Mechanism
The vulnerability can be exploited through network access, with attackers requiring high privileges and user interaction.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade Sulu to version 1.6.43 or later.
- Ensure admin users only create tags.
Long-Term Security Practices
- Regularly update Sulu and all associated components.
- Implement input validation and output encoding to prevent XSS vulnerabilities.
Patching and Updates
Apply patches provided by Sulu promptly to address this vulnerability.