---
id: CVE-2025-66459
title: >-
  Lookyloo is a web interface that allows users to capture a website page and
  then display a tree of domains that call each other
summary: >-
  Lookyloo is a web interface that allows users to capture a website page and
  then display a tree of domains that call each other. Prior to 1.35.3, a XSS
  vulnerability can be triggered when a user submits a list of URLs to capture,
  one of …
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: lookyloo
product: lookyloo
affected:
  - lookyloo < 1.35.3
patched:
  - lookyloo 1.35.3
published: '2025-12-02'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T23:10:00.463'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66459'
references:
  - url: >-
      https://github.com/Lookyloo/lookyloo/commit/1850a34b8cec52438df3b544295b20cfa35f8ad1
    label: security-advisories@github.com
  - url: >-
      https://github.com/Lookyloo/lookyloo/commit/8c3ab96de44c1ce15646d734aa06faf884329116
    label: security-advisories@github.com
  - url: >-
      https://github.com/Lookyloo/lookyloo/commit/95cdc00fe37fd89790fa89bb3ee3fefa2da38442
    label: security-advisories@github.com
  - url: >-
      https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-hvmh-j2jx-48wg
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00308
epssPercentile: 0.21101
ingestedAt: '2026-09-25T23:21:16.865Z'
---

## Overview

Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, a XSS vulnerability can be triggered when a user submits a list of URLs to capture, one of them contains a HTML element, and the capture fails. Then, the error field is populated with an error message that contains the bad URL they tried to capture, triggering the XSS. This vulnerability is fixed in 1.35.3.

## Affected

- `lookyloo < 1.35.3`

## Remediation

Upgrade past the affected range:

- `lookyloo 1.35.3`