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CVE-2021-21442 : Vulnerability Insights and Analysis

Learn about CVE-2021-21442, a Medium severity XSS vulnerability in OTRS AG Time Accounting. Find out the impact, affected systems, mitigation steps, and preventive measures here.

This article provides an overview of CVE-2021-21442, a Cross-site Scripting (XSS) vulnerability in OTRS AG Time Accounting version 7.0.x prior to 7.0.19, allowing injection of malicious JavaScript code in certain fields.

Understanding CVE-2021-21442

CVE-2021-21442 is a security vulnerability that enables the injection of malicious JavaScript code in specific fields within the OTRS AG Time Accounting project create screen, potentially leading to code execution in the Reporting screen.

What is CVE-2021-21442?

The CVE-2021-21442 vulnerability, classified as CWE-79 Cross-site Scripting (XSS), affects OTRS AG Time Accounting versions 7.0.x prior to 7.0.19. Attackers could exploit this flaw to execute arbitrary scripts within the application.

The Impact of CVE-2021-21442

With a CVSS v3.1 base score of 4.5 (Medium severity), the XSS vulnerability in OTRS AG Time Accounting could result in high confidentiality impact and the need for high privileges to exploit. The attack complexity is low, and user interaction is required.

Technical Details of CVE-2021-21442

This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

In OTRS AG Time Accounting 7.0.x versions prior to 7.0.19, the vulnerability allows the injection of malicious JavaScript code in project create screens, enabling potential code execution in the Reporting screen.

Affected Systems and Versions

OTRS AG Time Accounting versions 7.0.x custom prior to 7.0.19 are impacted by this XSS vulnerability.

Exploitation Mechanism

Attackers can inject malicious JS code in specific fields of the Time Accounting project create screen, potentially executing the code in the Reporting screen.

Mitigation and Prevention

To address CVE-2021-21442, immediate steps should be taken along with long-term security practices and timely patching and updates.

Immediate Steps to Take

Users are advised to update to OTRS Time Accounting 7.0.20 to mitigate the XSS vulnerability and enhance application security.

Long-Term Security Practices

Implementing secure coding practices, regular security assessments, and user input validation can help prevent XSS attacks in the future.

Patching and Updates

Regularly applying vendor-supplied patches and staying informed about security advisories are essential to maintain system security and protect against emerging threats.

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