CVE-2019-19901 Explained : Impact and Mitigation

A vulnerability was found in versions 1.13.x before 1.13.5 and 1.14.x before 1.14.2 of Backdrop CMS, potentially leading to cross-site scripting (XSS) attacks.

Understanding CVE-2019-19901

This CVE identifies a security issue in Backdrop CMS versions 1.13.x and 1.14.x that could allow attackers to execute malicious scripts through specially crafted block descriptions.

What is CVE-2019-19901?

The vulnerability arises from inadequate output filtering in displaying specific block descriptions created by administrators, enabling attackers to inject malicious scripts during layout configuration, resulting in XSS attacks.

The Impact of CVE-2019-19901

The vulnerability poses a risk of cross-site scripting attacks, which could lead to unauthorized access, data theft, and potential compromise of user interactions on affected websites.

Technical Details of CVE-2019-19901

This section provides technical insights into the vulnerability.

Vulnerability Description

The lack of proper output filtering in Backdrop CMS versions 1.13.x and 1.14.x allows attackers to insert malicious scripts into block descriptions, potentially leading to XSS attacks.

Affected Systems and Versions

Backdrop CMS versions 1.13.x before 1.13.5
Backdrop CMS versions 1.14.x before 1.14.2

Exploitation Mechanism

Attackers can exploit this vulnerability by creating carefully crafted block descriptions and persuading administrators to configure layouts, executing malicious scripts in the process.

Mitigation and Prevention

Protecting systems from CVE-2019-19901 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Backdrop CMS to versions 1.13.5 and 1.14.2 to mitigate the vulnerability.
Regularly monitor and review block descriptions for any suspicious content.

Long-Term Security Practices

Educate administrators on secure configuration practices to prevent XSS attacks.
Implement strict permission controls for creating custom blocks to limit potential attack surfaces.
Employ web application firewalls to filter and block malicious scripts.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.