---
id: CVE-2025-42620
title: |-
  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 bundle…
summary: |-
  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 bundle…
severity: none
cwe:
  - CWE-79
published: '2025-12-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T22:10:00.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-42620'
references:
  - url: 'https://vulnerability.circl.lu/vuln/gcve-1-2025-0035'
    label: a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
tags:
  - nvd
epss: 0.00293
epssPercentile: 0.20365
ingestedAt: '2026-10-14T23:00:02.027Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.