CVE-2024-27083: 
Python vulnerability analysis and mitigation

Flask-AppBuilder, an application development framework built on top of Flask, was found to contain a Cross-Site Scripting (XSS) vulnerability (CVE-2024-27083) in its OAuth login page. The vulnerability was discovered in version 4.1.4 and affects all versions up to 4.2.0. The issue was patched in version 4.2.1 (GitHub Advisory).

The vulnerability exists in the OAuth login page where user input from the URL is not properly sanitized. The CVSS v3.1 base score is 4.3 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N. The vulnerability is classified as CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (NVD).

An attacker could exploit this vulnerability by crafting a malicious URL to the OAuth login page. When a user follows this URL, malicious JavaScript code could be injected and executed in the user's browser, potentially leading to unauthorized access to user data (GitHub Advisory).

The vulnerability requires user interaction, as the victim must be tricked into following a specially crafted URL. The attack vector is network-based, with low attack complexity and no privileges required for exploitation (GitHub Advisory).

Users should upgrade to Flask-AppBuilder version 4.2.1 or newer, which contains the fix for this vulnerability. The fix involves ensuring that user input is not treated as safe in the OAuth view (GitHub Commit).