CVE-2018-12587 : Vulnerability Insights and Analysis

An issue with cross-site scripting (XSS) has been identified in version 1.3 of the German Spelling Dictionary add-on for the Opera Browser developed by valeuraddons. This vulnerability allows external attackers to inject unauthorized web scripts or HTML by manipulating the ajax query parameter in the URL Address Bar, instead of using it as intended for spelling check purposes.

Understanding CVE-2018-12587

A cross-site scripting (XSS) vulnerability was found in valeuraddons German Spelling Dictionary v1.3 (an Opera Browser add-on). Instead of providing text for a spelling check, remote attackers may inject arbitrary web script or HTML via the ajax query parameter in the URL Address Bar.

What is CVE-2018-12587?

CVE ID: CVE-2018-12587
Published Date: August 13, 2018
Affected Version: 1.3 of German Spelling Dictionary add-on for Opera Browser

The Impact of CVE-2018-12587

Attackers can inject unauthorized web scripts or HTML
Exploitation through manipulation of the ajax query parameter

Technical Details of CVE-2018-12587

Vulnerability Description

The vulnerability in version 1.3 of the German Spelling Dictionary add-on for the Opera Browser allows for cross-site scripting (XSS) attacks by manipulating the ajax query parameter.

Affected Systems and Versions

Affected Version: 1.3
Product: German Spelling Dictionary add-on for Opera Browser

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating the ajax query parameter in the URL Address Bar to inject unauthorized web scripts or HTML.

Mitigation and Prevention

Immediate Steps to Take

Disable or remove the German Spelling Dictionary add-on version 1.3
Use alternative spelling check tools

Long-Term Security Practices

Regularly update browser add-ons and extensions
Educate users on safe browsing practices

Patching and Updates

Check for security updates from the add-on developer
Apply patches or updates provided by the vendor