CVE-2020-25288 : Security Advisory and Response

An issue was discovered in MantisBT before 2.24.3 that allows HTML injection and potential execution of arbitrary JavaScript when editing an Issue in a Project with a crafted Regular Expression property.

Understanding CVE-2020-25288

This CVE identifies a vulnerability in MantisBT that could lead to HTML injection and potential execution of arbitrary JavaScript.

What is CVE-2020-25288?

The vulnerability in MantisBT before version 2.24.3 arises when editing an Issue in a Project with a Custom Field containing a crafted Regular Expression property. Improper escaping of the form input's pattern attribute enables HTML injection and, under certain CSP settings, potential execution of arbitrary JavaScript.

The Impact of CVE-2020-25288

The exploitation of this vulnerability could result in unauthorized execution of JavaScript code within the context of the affected user's browser, potentially leading to further attacks such as session hijacking or sensitive data theft.

Technical Details of CVE-2020-25288

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability allows for HTML injection and potential execution of arbitrary JavaScript due to improper escaping of form input's pattern attribute in MantisBT before version 2.24.3.

Affected Systems and Versions

MantisBT versions before 2.24.3 are affected by this vulnerability.

Exploitation Mechanism

Crafted Regular Expression property in a Custom Field is used to exploit the vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2020-25288 requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade MantisBT to version 2.24.3 or later to mitigate the vulnerability.
Review and sanitize input fields to prevent HTML injection.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement Content Security Policy (CSP) to restrict the execution of inline scripts and mitigate XSS attacks.
Educate users on safe browsing practices and potential risks of executing untrusted scripts.
Monitor and audit web application inputs and outputs for malicious content.

Patching and Updates

Stay informed about security updates and patches released by MantisBT.
Apply patches promptly to ensure the system is protected against known vulnerabilities.