CVE-2015-3989: concrete5 Cross-site Scripting Vulnerability
Summary
CVE-2015-3989: concrete5 vulnerable to Cross-site Scripting. Affects concrete5/concrete5 versions < 5.7.4. Fixed in 5.7.4. How to fix ↓
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Background
Concrete5 is an open-source content management system (CMS) that enables users to create and manage websites easily. It offers features such as in-context editing, customizable themes, and a robust community of developers. However, prior to version 5.7.4, concrete5 was susceptible to multiple cross-site scripting (XSS) vulnerabilities, which could allow attackers to inject malicious scripts into web pages viewed by other users.
Vulnerability Detail
The vulnerability arises from inadequate input validation in concrete5, specifically in the handling of private messages and other unspecified vectors. This flaw allows remote attackers to execute arbitrary web scripts or HTML in the context of a user's session, potentially leading to session hijacking, data theft, or defacement of the website. The severity of this vulnerability is classified as low, but it can still pose significant risks if exploited.
How To Fix
Minimum fixed version
5.7.4
This is the first release that contains the fix.
composer require concrete5/concrete5:5.7.4Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate upgrading is not feasible, a temporary workaround is to implement input sanitization on user-generated content to mitigate the risk of XSS attacks. This can involve using libraries that escape HTML characters or filtering out potentially harmful scripts before displaying user input.
Conclusion
The concrete5 CMS has a known vulnerability (CVE-2015-3989) that allows for cross-site scripting attacks. It is essential to update to version 5.7.4 or later to mitigate this risk. Users should also consider using Vulert to monitor their applications for vulnerabilities in real-time.
See every vulnerability recorded for concrete5/concrete5 →
FAQ
XSS is a security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users, potentially compromising user data and session integrity.
You can check if your installation is affected by using Vulert, which monitors open-source vulnerabilities in real-time. Visit Vulert Scanner to analyze your application without needing to sign up.
Exploitation of this vulnerability can lead to session hijacking, unauthorized access to user accounts, and the ability to manipulate website content.
Yes, updating to version 5.7.4 or later is crucial to protect your site from potential XSS attacks and ensure the security of your users.
If an immediate update is not possible, consider implementing input sanitization as a temporary measure to reduce the risk of XSS attacks.
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