CVE-2021-34190 : What You Need to Know

A stored cross-site scripting (XSS) vulnerability in index.php?menu=billing_rates of Issabel PBX version 4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the 'Name' or 'Prefix' fields under the 'Create New Rate' module.

Understanding CVE-2021-34190

This section provides insight into the impact and technical details of the CVE-2021-34190 vulnerability.

What is CVE-2021-34190?

The CVE-2021-34190 vulnerability involves a stored cross-site scripting (XSS) issue in Issabel PBX version 4, which enables malicious actors to run unauthorized web scripts by injecting a manipulated payload into specific input fields.

The Impact of CVE-2021-34190

The vulnerability's exploitation can result in the execution of arbitrary code, unauthorized access to sensitive information, and potential exposure of user data to malicious entities.

Technical Details of CVE-2021-34190

In this section, we delve deeper into the technical aspects of the CVE-2021-34190 vulnerability.

Vulnerability Description

The XSS flaw in index.php?menu=billing_rates of Issabel PBX v4 allows threat actors to insert malicious scripts into the 'Name' or 'Prefix' fields within the 'Create New Rate' module, potentially leading to the execution of unauthorized web scripts.

Affected Systems and Versions

The vulnerability impacts Issabel PBX version 4 instances and may affect systems that have not implemented appropriate security measures to mitigate XSS attacks.

Exploitation Mechanism

By manipulating the input fields 'Name' or 'Prefix' in the 'Create New Rate' module of Issabel PBX v4, attackers can inject malicious payloads, enabling XSS attacks with harmful consequences.

Mitigation and Prevention

This section outlines the essential steps to address and prevent the CVE-2021-34190 vulnerability.

Immediate Steps to Take

Organizations should apply security patches released by Issabel PBX promptly to mitigate the risk of exploitation. Additionally, input validation mechanisms can help prevent XSS attacks.

Long-Term Security Practices

Regular security audits, employee training on cybersecurity best practices, and continuous monitoring of web applications are crucial for maintaining a secure environment.

Patching and Updates

Staying informed about security advisories and promptly applying patches and updates to Issabel PBX installations is vital to protect systems from known vulnerabilities.