CVE-2025-66458

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.

Score

CVSS 3.1 6.1 Medium

Status

Analyzed - security-advisories@github.com

Published

2025-12-02

Last modified

2025-12-02

Weaknesses

CWE-79

Affected products

• Lookyloo (Lookyloo)

References

• https://github.com/Lookyloo/lookyloo/commit/b6ee2fee0afff0b35f37dd891bbce9d53ed8a290
• https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-58h2-652v-gq87