CVE-2021-42112 : Vulnerability Insights and Analysis
Discover how the LimeSurvey 3.x-LTS through 3.27.18 is susceptible to XSS attacks in modaldialog.js and uploader.js with CVE-2021-42112. Learn the impact, technical details, and mitigation steps.
LimeSurvey 3.x-LTS through 3.27.18 is vulnerable to XSS attacks in assets/scripts/modaldialog.js and assets/scripts/uploader.js.
Understanding CVE-2021-42112
This CVE involves the "File upload question" functionality in LimeSurvey 3.x-LTS through 3.27.18, enabling XSS attacks.
What is CVE-2021-42112?
The vulnerability in LimeSurvey's file upload question feature allows attackers to execute XSS attacks through specific JavaScript files.
The Impact of CVE-2021-42112
The XSS vulnerability can lead to unauthorized access to sensitive data, manipulation of content, and potential phishing attacks.
Technical Details of CVE-2021-42112
The technical details of CVE-2021-42112 provide insight into the vulnerability's specifics:
Vulnerability Description
The flaw exists in the handling of user-supplied data in the mentioned JavaScript files, enabling malicious code execution.
Affected Systems and Versions
- Product: LimeSurvey
- Versions: 3.x-LTS through 3.27.18
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting malicious scripts into the affected JavaScript files to execute XSS attacks.
Mitigation and Prevention
Protect your systems from CVE-2021-42112 with these mitigation strategies:
Immediate Steps to Take
- Apply security patches provided by LimeSurvey promptly
- Implement input validation and output encoding to prevent XSS attacks
Long-Term Security Practices
- Regular security assessments and code reviews
- Educate users on safe browsing habits and phishing awareness
Patching and Updates
- Stay updated with security advisories from LimeSurvey
- Monitor security mailing lists for any new developments