CVE-2021-20753 : Security Advisory and Response

This article provides an overview of CVE-2021-20753, a Cross-Site Scripting vulnerability in Cybozu Garoon versions 4.0.0 to 5.0.2, allowing remote attackers to inject arbitrary scripts.

Understanding CVE-2021-20753

CVE-2021-20753 is a security vulnerability found in Cybozu Garoon, specifically in the Scheduler module, that enables authenticated remote attackers to execute malicious scripts through unspecified vectors.

What is CVE-2021-20753?

The CVE-2021-20753 vulnerability is classified as Cross-Site Scripting (XSS), which poses a serious threat as it allows attackers to inject and execute scripts in the user's web browser, leading to unauthorized access or data theft.

The Impact of CVE-2021-20753

This vulnerability can be exploited by remote authenticated attackers to perform various malicious actions, such as stealing sensitive information, executing arbitrary code, or performing unauthorized operations within the affected system.

Technical Details of CVE-2021-20753

In this section, we will delve into the technical aspects of the CVE-2021-20753 vulnerability in Cybozu Garoon.

Vulnerability Description

The XSS flaw in Cybozu Garoon versions 4.0.0 to 5.0.2 allows remote authenticated attackers to inject and execute arbitrary scripts through the Scheduler module, creating a potential security risk for organizations using the affected versions.

Affected Systems and Versions

Cybozu Garoon versions 4.0.0 to 5.0.2 are confirmed to be impacted by this vulnerability, exposing organizations that use these versions to potential exploitation by malicious actors.

Exploitation Mechanism

By exploiting this XSS vulnerability, attackers can leverage the insecure code execution to manipulate user sessions, steal sensitive data, or perform actions on behalf of legitimate users without their consent.

Mitigation and Prevention

To safeguard systems from CVE-2021-20753, immediate actions and long-term security practices need to be implemented.

Immediate Steps to Take

Organizations should apply security patches released by Cybozu, Inc., to address this vulnerability promptly. Additionally, users are advised to monitor their systems for any suspicious activities.

Long-Term Security Practices

Maintaining up-to-date security measures, conducting regular security audits, educating users about safe browsing habits, and implementing web application firewalls can help prevent XSS attacks and enhance overall cybersecurity.

Patching and Updates

Regularly checking for updates from Cybozu, Inc., and promptly applying patches is crucial in mitigating security risks associated with known vulnerabilities.