CVE-2021-34590 : What You Need to Know

In Bender/ebee Charge Controllers in multiple versions are prone to Cross-site Scripting. An authenticated attacker could write HTML Code into configuration values. These values are not properly escaped when displayed.

Understanding CVE-2021-34590

This CVE refers to a Cross-site Scripting vulnerability in Bender/ebee Charge Controllers that allows an authenticated attacker to inject HTML code into configuration values.

What is CVE-2021-34590?

The vulnerability in Bender/ebee Charge Controllers enables an attacker to perform Cross-site Scripting attacks by injecting malicious HTML code into configuration values.

The Impact of CVE-2021-34590

The impact of this vulnerability is rated as MEDIUM with a CVSS base score of 5.4. It affects the confidentiality and integrity of the system by allowing an attacker to execute malicious scripts in the context of a user's browser.

Technical Details of CVE-2021-34590

This section provides in-depth technical details of the CVE-2021-34590 vulnerability.

Vulnerability Description

The vulnerability allows an authenticated attacker to insert HTML code into configuration values without proper escaping, leading to Cross-site Scripting attacks.

Affected Systems and Versions

Bender/ebee Charge Controllers versions 5.11.x, 5.12.x, 5.13.x, and 5.20.x are affected by this vulnerability.

Exploitation Mechanism

An attacker with authentication can leverage the lack of proper input validation to inject malicious HTML code, impacting the security of the configuration values.

Mitigation and Prevention

To address CVE-2021-34590 and enhance system security, consider the following mitigation strategies.

Immediate Steps to Take

Apply the vendor-supplied patches or updates to fix the vulnerability.
Implement proper input validation and output encoding techniques to prevent Cross-site Scripting attacks.

Long-Term Security Practices

Regularly monitor and audit the application for vulnerabilities, especially related to input validation.
Provide security awareness training to developers and administrators to mitigate the risk of Cross-site Scripting vulnerabilities.

Patching and Updates

Stay informed about security advisories from Bender/ebee and apply patches promptly to protect the system against known vulnerabilities.