CVE-2021-34540 : What You Need to Know
Learn about CVE-2021-34540, a Cross-Site Scripting (XSS) vulnerability impacting Advantech WebAccess 8.4.2 and 8.4.4. Understand the risks, impact, and mitigation strategies.
This CVE-2021-34540 article provides an overview of a Cross-Site Scripting (XSS) vulnerability found in Advantech WebAccess versions 8.4.2 and 8.4.4.
Understanding CVE-2021-34540
This section will delve into the details of the CVE-2021-34540 vulnerability.
What is CVE-2021-34540?
CVE-2021-34540 is a security vulnerability in Advantech WebAccess versions 8.4.2 and 8.4.4 that allows for XSS attacks through the username column of the bwRoot.asp page of WADashboard.
The Impact of CVE-2021-34540
This XSS vulnerability can be exploited by malicious actors to execute scripts in the context of a user's browser, potentially leading to account hijacking, sensitive data theft, or manipulation of web content.
Technical Details of CVE-2021-34540
In this section, we will explore the technical aspects of the CVE-2021-34540 vulnerability.
Vulnerability Description
The vulnerability arises from inadequate input validation in the username column of the bwRoot.asp page, allowing attackers to inject malicious scripts.
Affected Systems and Versions
Advantech WebAccess versions 8.4.2 and 8.4.4 are impacted by this security flaw.
Exploitation Mechanism
Attackers can exploit this vulnerability by inserting malicious scripts into the username field, which, when executed, can compromise user sessions and steal sensitive information.
Mitigation and Prevention
This section outlines steps to mitigate the risks posed by CVE-2021-34540.
Immediate Steps to Take
Ensure users refrain from entering untrusted input in the username field and consider implementing additional input validation mechanisms to prevent XSS attacks.
Long-Term Security Practices
Regularly educate users on safe browsing practices and keep systems updated with the latest security patches to prevent exploitation of known vulnerabilities.
Patching and Updates
It is crucial to apply security patches provided by Advantech promptly to address the CVE-2021-34540 vulnerability and enhance the overall security posture of WebAccess installations.