Inadequate XSS Prevention in CodeIgniter/Framework Security Library
Summary
GHSA-q9j3-4ghj-6h57: Inadequate XSS Prevention in CodeIgniter/Framework Security Library. Affects codeigniter/framework versions < 3.0.3. Fixed in 3.0.3. How to fix ↓
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Background
CodeIgniter/Framework is a popular PHP framework used for developing web applications. It provides a set of libraries and tools to simplify the development process. The Security Library in CodeIgniter/Framework includes the xss_clean() method, which is designed to sanitize input data and prevent Cross-Site Scripting (XSS) attacks. However, versions prior to 3.0.3 have a vulnerability that allows certain XSS vectors to bypass the intended protection mechanisms.
Vulnerability Detail
The xss_clean() method in the Security Library of CodeIgniter/Framework, specifically in versions before 3.0.3, is susceptible to a Cross-Site Scripting (XSS) vulnerability. This vulnerability occurs because the method does not adequately mitigate specific XSS vectors, leaving a potential security gap. An attacker can exploit this vulnerability by injecting malicious scripts or code into user input fields, which can then be executed by unsuspecting users. This can lead to various consequences, including unauthorized access, data theft, and the potential for further exploitation of the affected application.
How To Fix
Minimum fixed version
3.0.3
This is the first release that contains the fix.
composer require codeigniter/framework:3.0.3Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If updating to the latest version is not immediately feasible, a temporary workaround can be implemented by manually sanitizing user input using additional security measures. This can include input validation, output encoding, and strict input filtering. However, it is important to note that these workarounds may not provide the same level of protection as the updated version of CodeIgniter/Framework.
Conclusion
Inadequate XSS prevention in the CodeIgniter/Framework Security Library can leave web applications vulnerable to Cross-Site Scripting attacks. It is crucial to update to version 3.0.3 or later to fix this vulnerability. In the meantime, implementing additional security measures can provide temporary protection. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
CodeIgniter/Framework is a PHP framework used for developing web applications. It provides a set of libraries and tools to simplify the development process.
Cross-Site Scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious scripts or code into web pages viewed by other users. This can lead to unauthorized access, data theft, and other malicious activities.
The xss_clean() method in the Security Library of CodeIgniter/Framework is designed to sanitize input data by removing potentially malicious content. It helps prevent XSS attacks by filtering and encoding user input.
This vulnerability can lead to unauthorized access, data theft, and the potential for further exploitation of the affected application. Attackers can inject malicious scripts or code into user input fields, which can then be executed by unsuspecting users.
To protect your application, it is recommended to update CodeIgniter/Framework to version 3.0.3 or later. Additionally, implementing proper input validation, output encoding, and strict input filtering can help mitigate the risk of XSS attacks.
References
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