Description: Multiple Cross Site Scripting vulnerability in ConcreteCMS v.9.2.1 allows a local attacker to execute arbitrary code via a crafted script to the Header and Footer Tracking Codes of the SEO & Statistics.
Attack Vectors: Scripting A vulnerability in the sanitization of the entry in the Header and Footer Tracking Codes of "SEO & Statistics" allows injecting JavaScript code that will be executed when the user accesses the web page.
When logging into the panel, we will go to the "SEO & Statistics- Header and Footer Tracking Codes." section off Dashboard Menu.
<img src=x:alert(alt) onerror=eval(src) alt='XSS Header'><img src=x:alert(alt) onerror=eval(src) alt='XSS Footer'>In the following image you can see the embedded code that executes the payload in the main web.
We can use a payload to steal cookies and obtain them when a user logs on to the website in the two vulnerable fields.
Original session cookie.
Request captured with the external server:
