CVE-2018-11564 : Exploit Details and Defense Strategies

YOOtheme Pagekit versions 1.0.13 and earlier contain a vulnerability known as Stored XSS, allowing users to upload malicious code through the picture upload feature.

Understanding CVE-2018-11564

YOOtheme Pagekit 1.0.13 and earlier versions are susceptible to a Stored XSS vulnerability that enables the insertion of harmful code via the picture upload functionality.

What is CVE-2018-11564?

This vulnerability allows a user with elevated privileges to upload a photo in SVG format without the system filtering or stripping it. By creating a link on the website that points to a specific SVG file, an attacker can trigger an XSS attack when another user clicks on the link.

The Impact of CVE-2018-11564

Malicious users can exploit this vulnerability to execute cross-site scripting attacks on unsuspecting users.
The vulnerability can lead to unauthorized access to sensitive information and compromise the security of the affected systems.

Technical Details of CVE-2018-11564

YOOtheme Pagekit 1.0.13 and earlier versions are affected by the following:

Vulnerability Description

Stored XSS vulnerability in YOOtheme Pagekit allows for the upload of malicious code through the picture upload feature.

Affected Systems and Versions

Product: YOOtheme Pagekit
Versions affected: 1.0.13 and earlier

Exploitation Mechanism

A user with elevated privileges can upload an SVG file without it being filtered or stripped by the system.
By creating a specific link on the website, an attacker can induce an XSS attack when the link is clicked by another user.

Mitigation and Prevention

To address CVE-2018-11564, consider the following steps:

Immediate Steps to Take

Update YOOtheme Pagekit to the latest version to patch the vulnerability.
Avoid clicking on suspicious links or downloading files from untrusted sources.

Long-Term Security Practices

Regularly monitor and audit the security configurations of the Pagekit installation.
Educate users about the risks of clicking on unknown links or downloading files from unverified sources.

Patching and Updates

Apply security patches and updates provided by YOOtheme to mitigate the vulnerability and enhance system security.