Vulnerability Description
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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2025-42620?
CVE-2025-42620 is a documented vulnerability. 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 re...
How severe is CVE-2025-42620?
CVSS scoring is not yet available for CVE-2025-42620. Check NVD for updates.
Is there a patch for CVE-2025-42620?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.