CVE-2025-66458 – Lookyloo has multiple XSS due to unsafe use of f-strings in Markup

CVE ID : CVE-2025-66458

Published : Dec. 2, 2025, 7:15 p.m. | 1 hour, 10 minutes ago

Description : 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, there are multiple XSS due to unsafe use of f-strings in Markup. The issue requires a malicious 3rd party server responding with a JSON document containing JS code in a script element. This vulnerability is fixed in 1.35.3.

Severity: 5.3 | MEDIUM

Visit the link for more details, such as CVSS details, affected products, timeline, and more…