CVE-2020-16266 Explained : Impact and Mitigation
Discover the XSS vulnerability in MantisBT before version 2.24.2, allowing remote attackers to inject malicious HTML. Learn how to mitigate the risk and prevent code execution.
An XSS issue was discovered in MantisBT before 2.24.2, allowing a remote attacker to inject arbitrary HTML into the page.
Understanding CVE-2020-16266
What is CVE-2020-16266?
This CVE refers to a cross-site scripting (XSS) vulnerability found in MantisBT before version 2.24.2. The issue arises from improper escaping on the view_all_bug_page.php, enabling a remote attacker to insert malicious HTML into the page.
The Impact of CVE-2020-16266
The vulnerability could lead to potential code execution in the browser of any user who subsequently views the affected issue, provided Content Security Policy (CSP) settings allow it.
Technical Details of CVE-2020-16266
Vulnerability Description
The XSS flaw in MantisBT before 2.24.2 allows attackers to inject arbitrary HTML by saving it into a text Custom Field, posing a risk of code execution in users' browsers.
Affected Systems and Versions
- Product: MantisBT
- Vendor: N/A
- Versions: All versions before 2.24.2
Exploitation Mechanism
The vulnerability can be exploited by saving malicious HTML into a text Custom Field, which, when viewed by other users, can execute code in their browsers.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade MantisBT to version 2.24.2 or later to mitigate the XSS vulnerability.
- Avoid saving untrusted data into text Custom Fields.
Long-Term Security Practices
- Regularly update and patch software to address security vulnerabilities.
- Implement strict input validation and output encoding to prevent XSS attacks.
- Educate users on safe browsing practices and the risks of executing untrusted code.
Patching and Updates
Ensure timely installation of security patches and updates to protect against known vulnerabilities.