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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/Lookyloo/lookyloo/commit/b6ee2fee0afff0b35f37dd891bbce9d53ed8a290	Patch
https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-58h2-652v-gq87	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:lookyloo:lookyloo:*:*:*:*:*:*:*:*

History

05 Dec 2025, 14:58

Type	Values Removed	Values Added
CPE		cpe:2.3:a:lookyloo:lookyloo::::::::
First Time		Lookyloo Lookyloo lookyloo
References	~~() https://github.com/Lookyloo/lookyloo/commit/b6ee2fee0afff0b35f37dd891bbce9d53ed8a290 -~~	() https://github.com/Lookyloo/lookyloo/commit/b6ee2fee0afff0b35f37dd891bbce9d53ed8a290 - Patch
References	~~() https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-58h2-652v-gq87 -~~	() https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-58h2-652v-gq87 - Patch, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.1

02 Dec 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-02 19:15

Updated : 2025-12-05 14:58

NVD link : CVE-2025-66458

Mitre link : CVE-2025-66458

CVE.ORG link : CVE-2025-66458

JSON object : View

Products Affected

lookyloo

lookyloo

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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