CVE-2025-66458
BaseFortify
Publication date: 2025-12-02
Last updated on: 2025-12-05
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| lookyloo | lookyloo | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in Lookyloo versions prior to 1.35.3 involves multiple Cross-Site Scripting (XSS) issues caused by unsafe use of f-strings in Markup. It requires a malicious third-party server to respond with a JSON document containing JavaScript code inside a script element, which can then be executed in the Lookyloo web interface.
How can this vulnerability impact me? :
The vulnerability can allow an attacker to execute arbitrary JavaScript code in the context of the Lookyloo web interface, potentially leading to unauthorized actions, data theft, or session hijacking for users interacting with the affected versions.
What immediate steps should I take to mitigate this vulnerability?
Upgrade Lookyloo to version 1.35.3 or later, as this version contains the fix for the multiple XSS vulnerabilities caused by unsafe use of f-strings in Markup.