CVE-2021-25656 Explained : Impact and Mitigation

A stored XSS injection vulnerability has been discovered in the Avaya Aura Experience Portal Web management, potentially leading to the disclosure of sensitive information. This CVE affects versions 7.0 through 7.2.3 (without hotfix) and 8.0.0 (without hotfix).

Understanding CVE-2021-25656

This section will provide insights into the impact, technical details, and mitigation strategies related to CVE-2021-25656.

What is CVE-2021-25656?

The CVE-2021-25656 refers to stored XSS injection vulnerabilities found in the Avaya Aura Experience Portal Web management. These vulnerabilities enable authenticated users to expose sensitive data, affecting versions 7.0 through 7.2.3 and 8.0.0.

The Impact of CVE-2021-25656

With a CVSS base score of 5.3 (Medium severity), this vulnerability requires low privileges and user interaction. It has low impacts on confidentiality, integrity, and availability but poses risks of unauthorized disclosure of information.

Technical Details of CVE-2021-25656

Let's delve deeper into the specifics of this vulnerability.

Vulnerability Description

The vulnerability arises from improper neutralization of input during web page generation (CWE-79), facilitating stored XSS attacks.

Affected Systems and Versions

The affected systems include Avaya products with versions 7.0 through 7.2.3 and 8.0.0 (without hotfix).

Exploitation Mechanism

Attackers can exploit this vulnerability through a locally low-complexity attack vector, requiring no user interaction.

Mitigation and Prevention

Understanding the steps to address and prevent CVE-2021-25656 is crucial for maintaining system security.

Immediate Steps to Take

To mitigate risks, apply the relevant hotfixes provided by Avaya for affected versions, ensuring that sensitive information remains secure.

Long-Term Security Practices

Implementing secure coding practices, regular security audits, and employee training on identifying and avoiding XSS vulnerabilities can enhance long-term security.

Patching and Updates

Regularly monitor vendor security advisories and update Avaya Aura Experience Portal to the latest versions to integrate security patches and address known vulnerabilities.