U.S. Dept Of Defense: XSS on ( █████████.gov ) Via URL path

Hi team,
I was able to execute XSS on ███████.gov

Steps to produce -
1 -Turn on the burp intercepter
2- Go to https://██████.gov/xapi/statements?file"><script>alert(document.domain)</script>
3- In Intercepter add the following Headers

Authorization: Basic eGFwaS10b29sczp4YXBpLXRvb2xz
X-Experience-Api-Version: 1.0.1

4- when you send this GET request you will receive a response with XSS payload executed.

Impact

An attacker can send the malicious link to victims and steals victims’ cookie leading to account takeover.

System Host(s)

www.███.gov

Affected Product(s) and Version(s)

CVE Numbers

CVE-2021-41878

Steps to Reproduce

I have attached the Video POC, please check it out.

Suggested Mitigation/Remediation Actions

sanitize the inputs in the URL