CVE-2025-66458

MEDIUM EPSS 5.0%
Published Dec 2, 20257mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Medium
Find Similar
Published Dec 2, 2025 7mo ago
Last Modified Jun 17, 2026 2w 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.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
5.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
lookyloolookyloo* <1.35.3

References 2

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

Remediation

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