CVE-2025-66563
BaseFortify
Publication date: 2025-12-04
Last updated on: 2025-12-17
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| monkeytype | monkeytype | to 25.49.0 (exc) |
| monkeytype | monkeytype | 25.49.0 |
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 Monkeytype (version 25.49.0 and earlier) involves improper handling of user input in quote submissions. Specifically, the fields quote.text and quote.source are user-controlled and are inserted directly into the DOM without proper sanitization. Although some escaping is done using quotes and textarea tags, HTML tags within these inputs can still be rendered, allowing an attacker to execute malicious JavaScript on anyone viewing a malicious quote submission.
How can this vulnerability impact me? :
This vulnerability can lead to cross-site scripting (XSS) attacks, where an attacker can execute malicious JavaScript code in the context of users viewing the affected page. This can result in theft of user data, session hijacking, defacement, or other malicious actions performed on behalf of the victim user.