A serious security vulnerability has been identified in Flask-AppBuilder, a popular application development framework built on top of Flask. This vulnerability, identified as CVE-2024-27083, is a Cross-Site Scripting (XSS) issue discovered on the OAuth login page, which could be exploited by an attacker. The vulnerability was first introduced in version 4.1.4 and has now been patched in version 4.2.1. Due to the severity of this issue, it is crucial for developers and users of Flask-AppBuilder to update their software.
Vulnerability Details
The XSS vulnerability in Flask-AppBuilder's OAuth login page allows an attacker to exploit the URL parameter by crafting a malicious URL. This attack technique is effective because it enables the attacker to inject and execute JavaScript code on the user's browser. Here is a code snippet that demonstrates this vulnerability:
http://example.com/oauth/login?next=%22%3E%3Cscript%3Ealert%28%27XSS%20Attack%27%29%3C%2Fscript%3E%3C%22
In this example, the attacker crafts a URL to the OAuth login page, with the "next" URL parameter containing a malicious script. When the user clicks on the link, the script gets executed in their browser, potentially stealing sensitive information or performing other nefarious actions on the victim's behalf.
Original References
To gain more context about this vulnerability, you can refer to the official Flask-AppBuilder GitHub repository and CVE database:
- Flask-AppBuilder GitHub Repository: https://github.com/dpgaspar/Flask-AppBuilder
- CVE Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27083
Exploit Details
The exploit works by tricking a user into clicking a specially configured URL, as demonstrated in the example code snippet above. Once the malicious JavaScript code is executed on the user's browser, it can lead to various consequences, including but not limited to:
Stealing sensitive information such as session cookies or authentication tokens.
2. Redirecting the user to a malicious website for further attacks such as phishing or malware downloads.
Mitigation
To protect against this vulnerability, it is essential to update Flask-AppBuilder to the latest version (4.2.1) that includes the patch for CVE-2024-27083. Additionally, developers should implement the following best practices:
Use the Content Security Policy (CSP) header to limit the potential impact of XSS vulnerabilities.
- Educate users about the risks of clicking on untrusted links and provide guidance on how to identify suspicious URLs.
Conclusion
CVE-2024-27083 is a critical XSS vulnerability in Flask-AppBuilder's OAuth login page that could be exploited by attackers to inject and execute malicious JavaScript code on users' browsers. It is crucial for developers and users of Flask-AppBuilder to update their software to the latest version and follow best practices to reduce the likelihood of an attack.
Timeline
Published on: 02/29/2024 01:44:19 UTC
Last modified on: 02/29/2024 13:49:29 UTC