Unrated severityNVD Advisory· Published Dec 2, 2025· Updated Dec 2, 2025
Lookyloo has multiple XSS due to unsafe use of f-strings in Markup
CVE-2025-66458
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.
Affected products
2- Lookyloo/lookyloov5Range: < 1.35.3
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- github.com/Lookyloo/lookyloo/commit/b6ee2fee0afff0b35f37dd891bbce9d53ed8a290mitrex_refsource_MISC
- github.com/Lookyloo/lookyloo/security/advisories/GHSA-58h2-652v-gq87mitrex_refsource_CONFIRM
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