CVE-2019-15862 : Vulnerability Insights and Analysis

A vulnerability in CKFinder up to version 2.6.2.1 allows malicious users to upload files without extensions, bypassing file extension restrictions.

Understanding CVE-2019-15862

What is CVE-2019-15862?

CKFinder versions for ASP, ASP.NET, ColdFusion, and PHP are affected by a flaw that enables the upload of files without extensions, even when the application is configured to accept specific extensions.

The Impact of CVE-2019-15862

This vulnerability could be exploited by remote attackers to upload malicious files, potentially leading to unauthorized access or execution of arbitrary code on the affected systems.

Technical Details of CVE-2019-15862

Vulnerability Description

Improper validation of file names in CKFinder allows for the upload of files without extensions, regardless of the defined extension restrictions.

Affected Systems and Versions

CKFinder versions up to 2.6.2.1
CKFinder for ASP, ASP.NET, ColdFusion, and PHP

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading files without extensions, evading file extension filters set by the application.

Mitigation and Prevention

Immediate Steps to Take

Update CKFinder to version 2.6.3 or later to mitigate this vulnerability.
Implement strict file upload validation to check for file extensions and content.

Long-Term Security Practices

Regularly monitor and audit file uploads for any suspicious activities.
Educate users on safe file upload practices to prevent malicious uploads.

Patching and Updates

Stay informed about security updates and patches released by CKFinder to address vulnerabilities like this one.