CVE-2025-42620

In affected versions, vulnerability-lookup handled user-controlled

content in comments and bundles in an unsafe way, which could lead to

stored Cross-Site Scripting (XSS).

On the backend, the related_vulnerabilities field of bundles accepted

arbitrary strings without format validation or proper sanitization. On

the frontend, comment and bundle descriptions were converted from

Markdown to HTML and then injected directly into the DOM using string

templates and innerHTML. This combination allowed an attacker who could

create or edit comments or bundles to store crafted HTML/JavaScript

payloads which would later be rendered and executed in the browser of

any user visiting the affected profile page (user.html).

This issue affects Vulnerability-Lookup: before 2.18.0.