CVE-2018-3764 : Exploit Details and Defense Strategies

CVE-2018-3764 is a vulnerability in the Nextcloud Contacts application that could lead to a stored cross-site scripting (XSS) attack. This CVE was published on July 5, 2018.

Understanding CVE-2018-3764

This section provides insights into the nature and impact of the CVE.

What is CVE-2018-3764?

Prior to version 2.1.2 of Nextcloud Contacts, a vulnerability existed where search results in an autocomplete field were not properly sanitized. This flaw could be exploited by privileged users to execute a stored XSS attack.

The Impact of CVE-2018-3764

The vulnerability allowed for the creation of malicious search results by privileged users, such as administrators or group admins, potentially leading to XSS attacks.

Technical Details of CVE-2018-3764

Explore the technical aspects of the CVE in this section.

Vulnerability Description

In Nextcloud Contacts before version 2.1.2, a lack of sanitization in search results for an autocomplete field could result in a stored XSS vulnerability, requiring user interaction. The issue specifically affected group names.

Affected Systems and Versions

Product: Nextcloud Contacts application
Vendor: Nextcloud
Versions Affected: <2.1.2

Exploitation Mechanism

The vulnerability could be exploited by privileged users to manipulate search results in the autocomplete field, potentially leading to a stored XSS attack.

Mitigation and Prevention

Learn how to mitigate and prevent the exploitation of CVE-2018-3764.

Immediate Steps to Take

Upgrade Nextcloud Contacts to version 2.1.2 or newer to patch the vulnerability.
Educate users on safe browsing practices to prevent XSS attacks.

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities.
Implement access controls to limit the privileges of users, reducing the impact of potential attacks.

Patching and Updates

Stay informed about security advisories and promptly apply patches to secure your systems.