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CVE-2021-21087 : Vulnerability Insights and Analysis

Learn about CVE-2021-21087 affecting Adobe ColdFusion versions 2016, 2018, and 2021.0.0.323925, allowing arbitrary JavaScript code execution. Find mitigation steps here.

Adobe ColdFusion versions 2016 (update 16 and earlier), 2018 (update 10 and earlier), and 2021.0.0.323925 are affected by an Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability. This vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the current user through user interaction.

Understanding CVE-2021-21087

This CVE relates to an Improper Neutralization of Input During Web Page Generation vulnerability in Adobe ColdFusion.

What is CVE-2021-21087?

Adobe ColdFusion versions 2016, 2018, and 2021.0.0.323925 are susceptible to Cross-site Scripting (XSS) due to improper neutralization of input during web page generation.

The Impact of CVE-2021-21087

The vulnerability could be exploited by an attacker to execute arbitrary JavaScript code in the browser, potentially compromising the security and integrity of the user's data.

Technical Details of CVE-2021-21087

This section covers the specific technical details of the CVE.

Vulnerability Description

The vulnerability stems from improper input neutralization during web page generation, enabling attackers to inject and execute arbitrary JavaScript code.

Affected Systems and Versions

Adobe ColdFusion versions 2016 (up to update 16), 2018 (up to update 10), and 2021.0.0.323925 are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

Exploiting this vulnerability requires user interaction, allowing malicious actors to execute JavaScript code within the user's context.

Mitigation and Prevention

To address and prevent the CVE, follow these security measures.

Immediate Steps to Take

Users are advised to apply security patches provided by Adobe promptly and monitor their systems for any unusual activities.

Long-Term Security Practices

In the long term, organizations should maintain regular security updates, conduct security assessments, and educate users on best practices to mitigate XSS threats.

Patching and Updates

Regularly check for security updates from Adobe for ColdFusion versions 2016, 2018, and 2021.0.0.323925 to ensure protection against known vulnerabilities.

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