CVE-2021-42940 : What You Need to Know
Learn about CVE-2021-42940, a Cross Site Scripting (XSS) vulnerability in Projeqtor 9.3.1 that allows attackers to upload malicious JavaScript code. Find out impact, affected systems, and mitigation steps.
A Cross Site Scripting (XSS) vulnerability in Projeqtor 9.3.1 allows attackers to upload malicious JavaScript code via /projeqtor/tool/saveAttachment.php.
Understanding CVE-2021-42940
What is CVE-2021-42940?
A Cross Site Scripting (XSS) vulnerability in Projeqtor 9.3.1 allows attackers to upload a SVG file containing malicious JavaScript code via /projeqtor/tool/saveAttachment.php.
The Impact of CVE-2021-42940
This vulnerability can be exploited by attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.
Technical Details of CVE-2021-42940
Vulnerability Description
The vulnerability allows the uploading of SVG files containing malicious JavaScript code, leading to Cross Site Scripting (XSS) attacks.
Affected Systems and Versions
- Product: Projeqtor
- Version: 9.3.1
Exploitation Mechanism
Attackers can upload SVG files with malicious scripts through the /projeqtor/tool/saveAttachment.php endpoint, enabling them to execute arbitrary code.
Mitigation and Prevention
Immediate Steps to Take
- Update to a patched version of Projeqtor that addresses the XSS vulnerability.
- Implement input validation to sanitize uploaded files and prevent script execution.
Long-Term Security Practices
- Conduct regular security audits and penetration testing to identify and remediate vulnerabilities.
Patching and Updates
- Regularly check for security updates and patches from the Projeqtor vendor to ensure protection against known vulnerabilities.