HexBrain

U.S. Dept Of Defense · Report #3437836

Cross-Site Scripting via URL on ████████

Validstatus
mediumseverity
12upvotes
12 Jan 2026disclosed

How it was found

Description:

I discovered a Cross-Site Scripting (XSS) vulnerability on ████████ , specifically through the GET method. This vulnerability allows an attacker to inject malicious scripts that could be executed, potentially leading to cookie theft, session hijacking, and other malicious actions.

Payload: "><img%20%20src=x%20onerror="prompt(1)

References

██████

Impact

Exploitation of this vulnerability can lead to severe consequences, including but not limited: Session Hijacking: Attackers can steal cookies and impersonate legitimate users.

System Host(s)

████████

Affected Product(s) and Version(s)

CVE Numbers

Steps to Reproduce

Open the link:

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Suggested Mitigation/Remediation Actions

Apply context-dependent encoding and/or validation to user input rendered on a page

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original