# 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.

Source: https://junglewise.ai/threats/cve-2025-66458-lookyloo-is-a-web-interface-that-allows-users-to-capture-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-02  
License: CC BY 4.0 with a link back

CVE-2025-66458 · Severity: medium · CVSS 6.1 · Published 2025-12-02

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.

Technologies: [Lookyloo](https://junglewise.ai/threats/technologies/lookyloo). Vendors: [Lookyloo](https://junglewise.ai/threats/vendors/lookyloo).

## Quick answers

**Is CVE-2025-66458 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-66458 being exploited in the wild.

**How severe is CVE-2025-66458?** Medium severity, with a CVSS score of 6.1, published 2 December 2025.

**Which products and versions are affected?** Lookyloo. The advisory does not name versions.

**Is there a fix for CVE-2025-66458?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-66458?** Check whether you run Lookyloo. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Lookyloo

## Related threats

- [Lookyloo parameter injection in report API endpoint](https://junglewise.ai/threats/cve-2026-55835-lookyloo-is-a-web-interface-that-allows-users-to-capture-a)
- [Lookyloo denial of service via zip bomb in capture imports](https://junglewise.ai/threats/cve-2026-66913-lookyloo-denial-of-service-via-zip-bomb-in-capture-imports)
- [Lookyloo stored XSS in capture tree visualization page](https://junglewise.ai/threats/cve-2026-66824-lookyloo-stored-xss-in-capture-tree-visualization-page)
- [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.](https://junglewise.ai/threats/cve-2025-66460-lookyloo-is-a-web-interface-that-allows-users-to-capture-a)
- [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.](https://junglewise.ai/threats/cve-2025-66459-lookyloo-is-a-web-interface-that-allows-users-to-capture-a)