CVE-2017-10840 : What You Need to Know

WebCalendar versions 1.2.7 and earlier contain a cross-site scripting (XSS) vulnerability that allows attackers to inject unauthorized web script or HTML code.

Understanding CVE-2017-10840

WebCalendar 1.2.7 and earlier are affected by a cross-site scripting vulnerability, enabling attackers to introduce malicious scripts or HTML code.

What is CVE-2017-10840?

Cross-site scripting (XSS) vulnerability in WebCalendar 1.2.7 and earlier allows attackers to inject arbitrary web script or HTML via unspecified vectors.

The Impact of CVE-2017-10840

Attackers can execute malicious scripts on the victim's browser, leading to unauthorized actions.
Sensitive data may be compromised through injected scripts.

Technical Details of CVE-2017-10840

WebCalendar 1.2.7 and earlier are susceptible to cross-site scripting attacks.

Vulnerability Description

Cross-site scripting (XSS) vulnerability in WebCalendar 1.2.7 and earlier.

Affected Systems and Versions

Product: WebCalendar
Vendor: k5n.us
Versions affected: 1.2.7 and earlier

Exploitation Mechanism

Attackers exploit unspecified vectors to inject malicious web script or HTML code.

Mitigation and Prevention

Immediate Steps to Take:

Update WebCalendar to version 1.2.8 or later.
Implement input validation to sanitize user inputs.

Long-Term Security Practices:

Regularly monitor and audit web application code for vulnerabilities.
Educate developers on secure coding practices to prevent XSS vulnerabilities.
Employ web application firewalls to filter and block malicious traffic.
Stay informed about security updates and patches for WebCalendar.
Conduct security assessments and penetration testing to identify and address vulnerabilities.
Consider implementing Content Security Policy (CSP) to mitigate XSS risks.
Encourage users to use modern and secure web browsers.

Patching and Updates

Update to WebCalendar version 1.2.8 or later to patch the XSS vulnerability.