CVE-2021-20115 : What You Need to Know

A reflected cross-site scripting vulnerability in TCExam <= 14.8.3 could allow an attacker to hijack a victim's session via a crafted link.

Understanding CVE-2021-20115

This CVE describes a reflected cross-site scripting vulnerability in TCExam <= 14.8.3.

What is CVE-2021-20115?

CVE-2021-20115 highlights a security flaw in TCExam <= 14.8.3, where certain parameters were not properly validated, enabling attackers to execute reflected XSS attacks.

The Impact of CVE-2021-20115

The vulnerability could be exploited by attackers to hijack user sessions or perform unauthorized actions by tricking an administrator into clicking a malicious link.

Technical Details of CVE-2021-20115

This section delves into the specifics of the CVE.

Vulnerability Description

The flaw stems from inadequate validation of parameters in tce_filemanager.php, leading to the potential execution of reflected cross-site scripting attacks.

Affected Systems and Versions

TCExam versions <= 14.8.3 are affected by this vulnerability.

Exploitation Mechanism

By supplying unsanitized input via specified parameters, attackers can construct a malicious link that, if interacted with by an admin, can trigger the XSS payload.

Mitigation and Prevention

Learn how to safeguard your systems against CVE-2021-20115.

Immediate Steps to Take

It is advised to update TCExam to a secure version beyond 14.8.3 and sanitize user input to prevent XSS attacks.

Long-Term Security Practices

Regularly monitor for security updates and ensure that input validation mechanisms are robust to mitigate XSS risks.

Patching and Updates

Stay informed about security patches and promptly apply them to eliminate vulnerabilities.