Geeklog 2.2.1 - Cross-site Scripting

Overview #

A Cross-site Scripting (XSS) vulnerability exists in Geeklog CMS version 2.2.1. The vulnerability allows remote attackers to inject arbitrary web script or HTML.

Vulnerability Details #

Affected Versions: 2.2.1 and earlier

Root Cause: Insufficient input validation and output encoding allows attackers to inject malicious scripts.

Exploitation Requirements #

• No authentication required
• Victim must visit a crafted URL or page

Impact #

Remote attackers can exploit this vulnerability to:

• Steal user session cookies
• Perform actions on behalf of users
• Access CMS content

Proof of Concept #

Details available upon request.

Solution #

Upgrade to a patched version of Geeklog that includes proper input sanitization.

References #

• Invicti Advisory NS-20-001

Timeline #

• 2020-01-01 — Discovered

Credits: Omar Kurt