CVE-2021-33904 : Exploit Details and Defense Strategies

In this article, we will discuss the details of CVE-2021-33904, a vulnerability found in Accela Civic Platform through version 21.1 that exposes the security/hostSignon.do parameter servProvCode to cross-site scripting (XSS) attacks.

Understanding CVE-2021-33904

This section will provide insights into the nature and impact of the CVE-2021-33904 vulnerability.

What is CVE-2021-33904?

Accela Civic Platform through 21.1 is vulnerable to XSS through the security/hostSignon.do parameter servProvCode. The exact impact of this vulnerability can vary based on the configuration.

The Impact of CVE-2021-33904

The XSS vulnerability in the security/hostSignon.do parameter servProvCode could allow malicious actors to execute arbitrary scripts in the context of a user's session, potentially leading to unauthorized access or manipulation of data.

Technical Details of CVE-2021-33904

This section will delve into the technical aspects of the CVE-2021-33904 vulnerability.

Vulnerability Description

The vulnerability arises due to inadequate input validation of the servProvCode parameter, enabling attackers to inject and execute malicious scripts within the application.

Affected Systems and Versions

Accela Civic Platform versions up to 21.1 are affected by this XSS vulnerability, exposing users of these versions to potential exploit.

Exploitation Mechanism

Attackers can exploit the XSS vulnerability by injecting crafted scripts into the servProvCode parameter, which get executed when processed by the application, posing a security risk.

Mitigation and Prevention

This section covers the steps to mitigate and prevent the exploitation of CVE-2021-33904.

Immediate Steps to Take

Users are advised to implement input validation mechanisms, sanitize user inputs, and apply security patches released by the vendor to mitigate the risk of XSS attacks.

Long-Term Security Practices

Enforce secure coding practices, conduct regular security assessments, and educate developers and users on the importance of preventing XSS vulnerabilities in web applications.

Patching and Updates

Ensure timely application of security patches provided by Accela Civic Platform to address the XSS vulnerability and enhance the overall security posture of the system.