CVE-2021-20765 : What You Need to Know

This article provides an overview of CVE-2021-20765, a cross-site scripting vulnerability in Cybozu Garoon versions 4.0.0 to 5.0.2, allowing remote attackers to inject arbitrary scripts through unspecified vectors.

Understanding CVE-2021-20765

This section delves into the details of the vulnerability and its impact.

What is CVE-2021-20765?

The CVE-2021-20765 pertains to a cross-site scripting vulnerability found in the Bulletin feature of Cybozu Garoon software versions 4.0.0 to 5.0.2. This vulnerability enables a remote attacker to insert malicious scripts using unidentified entry points.

The Impact of CVE-2021-20765

Cybozu Garoon versions 4.0.0 to 5.0.2 are susceptible to exploitation by hackers to execute unauthorized script injections, potentially compromising the confidentiality and integrity of user data.

Technical Details of CVE-2021-20765

This section elucidates on the specific technical aspects of the vulnerability.

Vulnerability Description

The security flaw occurs due to inadequate input validation in the Bulletin module of Cybozu Garoon application versions 4.0.0 to 5.0.2, allowing attackers to embed malicious scripts through unspecified means.

Affected Systems and Versions

Cybozu Garoon software versions 4.0.0 to 5.0.2 are confirmed to be impacted by this vulnerability. Users of these versions are advised to take immediate actions to mitigate the risk.

Exploitation Mechanism

Remote threat actors can exploit the CVE-2021-20765 by injecting malicious scripts into the Bulletin section of Cybozu Garoon, leveraging the lack of proper validation checks to execute unauthorized commands.

Mitigation and Prevention

This section outlines essential steps to address and prevent the CVE-2021-20765 vulnerability.

Immediate Steps to Take

Users are recommended to update Cybozu Garoon to the latest version available, as the vendor may have released patches to resolve the cross-site scripting issue. Additionally, organizations should educate their users about the risks associated with unsolicited scripts.

Long-Term Security Practices

To enhance long-term cybersecurity, organizations should implement regular security audits, conduct employee awareness programs, and enforce stringent security policies to mitigate the likelihood of similar vulnerabilities in the future.

Patching and Updates

Regularly monitor for security updates from Cybozu, Inc., and promptly apply patches to eliminate vulnerabilities. Timely software updates play a crucial role in fortifying the system against emerging threats.