CVE-2019-14769 : Exploit Details and Defense Strategies

Backdrop CMS 1.12.x and 1.13.x versions prior to 1.12.8 and 1.13.3 have a vulnerability that could allow attackers to execute scripts through specially crafted block labels.

Understanding CVE-2019-14769

This CVE involves a security issue in Backdrop CMS versions 1.12.x and 1.13.x that could be exploited by attackers to execute malicious scripts.

What is CVE-2019-14769?

Backdrop CMS versions 1.12.x before 1.12.8 and 1.13.x before 1.13.3 do not adequately filter output for certain block labels created by administrators. This vulnerability could enable an attacker to create a custom label and execute scripts during layout management, provided they have permission to create custom blocks on the site.

The Impact of CVE-2019-14769

The vulnerability could lead to unauthorized execution of scripts by attackers with administrative privileges, potentially compromising the security and integrity of the affected Backdrop CMS instances.

Technical Details of CVE-2019-14769

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in Backdrop CMS versions 1.12.x and 1.13.x allows attackers to inject and execute scripts through specially crafted block labels, exploiting the lack of proper output filtering.

Affected Systems and Versions

Backdrop CMS 1.12.x versions prior to 1.12.8
Backdrop CMS 1.13.x versions prior to 1.13.3

Exploitation Mechanism

Attackers can exploit this vulnerability by creating customized block labels and tricking administrators into executing malicious scripts while managing layouts.

Mitigation and Prevention

Protecting systems from CVE-2019-14769 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Backdrop CMS to versions 1.12.8 or 1.13.3 to mitigate the vulnerability.
Monitor for any suspicious activities or unauthorized changes in block labels.

Long-Term Security Practices

Regularly review and update permissions for creating custom blocks on the site.
Educate administrators on the risks of executing scripts from untrusted sources.

Patching and Updates

Apply patches and updates provided by Backdrop CMS to address the vulnerability and enhance system security.