CVE-2021-3026 Explained : Impact and Mitigation

Invision Community IPS Community Suite before 4.5.4.2 has a vulnerability that allows XSS during the quoting of a post or comment.

Understanding CVE-2021-3026

This CVE describes a cross-site scripting (XSS) vulnerability in Invision Community IPS Community Suite.

What is CVE-2021-3026?

The CVE-2021-3026 vulnerability exists in versions of Invision Community IPS Community Suite prior to 4.5.4.2, enabling attackers to execute malicious scripts by quoting a post or comment.

The Impact of CVE-2021-3026

The XSS vulnerability can be exploited by attackers to inject scripts, steal user session cookies, deface websites, redirect users to malicious sites, or perform other actions posing a significant security risk.

Technical Details of CVE-2021-3026

This section provides more insights into the vulnerability.

Vulnerability Description

Invision Community IPS Community Suite before 4.5.4.2 lacks proper sanitization, allowing attackers to execute arbitrary scripts when quoting a post or comment.

Affected Systems and Versions

All versions of Invision Community IPS Community Suite before 4.5.4.2 are affected by this security flaw.

Exploitation Mechanism

Exploiting the CVE-2021-3026 vulnerability requires an attacker to quote a post or comment, injecting malicious scripts that get executed in the context of the victim's browser.

Mitigation and Prevention

Protecting your system from CVE-2021-3026 is crucial to maintaining security.

Immediate Steps to Take

Users are advised to update their Invision Community IPS Community Suite to version 4.5.4.2 or newer to mitigate the XSS vulnerability.

Long-Term Security Practices

Implementing input validation and output encoding practices can help prevent XSS vulnerabilities in web applications.

Patching and Updates

Regularly check for security updates and patches from the vendor to address known vulnerabilities and enhance the security of your system.