CVE-2015-8606: Silverstripe CMS XSS Vulnerability
Summary
CVE-2015-8606: Silverstripe CMS XSS Vulnerability. Affects silverstripe/cms across 2 version ranges.
< 3.1.16
>= 3.2.0, < 3.2.1
Fixed in 3.1.16 or 3.2.1, depending on the release line you run. How to fix ↓
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Background
SilverStripe CMS is a popular content management system and framework used for building websites and web applications. It provides a user-friendly interface for managing content and has a wide range of features and functionalities. However, versions before 3.1.16 and 3.2.0 before 3.2.1 are vulnerable to multiple cross-site scripting (XSS) attacks. These vulnerabilities allow remote attackers to inject arbitrary web script or HTML through the 'Locale' or 'FailedLoginCount' parameters in the 'admin/security/EditForm/field/Members/item/new/ItemEditForm' endpoint.
Vulnerability Detail
The XSS vulnerabilities in SilverStripe CMS & Framework versions before 3.1.16 and 3.2.0 before 3.2.1 can be exploited by remote attackers to inject malicious web script or HTML. By manipulating the 'Locale' or 'FailedLoginCount' parameters in the 'ItemEditForm' endpoint, an attacker can execute arbitrary code in the context of the affected user's browser. This can lead to various security risks, including session hijacking, data theft, and unauthorized actions on the affected website or application.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
< 3.1.163.1.16composer require silverstripe/cms:3.1.16 -
>= 3.2.0, < 3.2.13.2.1composer require silverstripe/cms:3.2.1
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Workaround
If upgrading to the latest version is not immediately feasible, a temporary workaround can be implemented by sanitizing and validating user input before it is processed by the affected endpoint. This can be achieved by implementing input validation and output encoding techniques to prevent the execution of malicious scripts. Here is an example of how input validation can be done in PHP:
$input = $_GET['Locale'];
// Sanitize and validate the input
$sanitizedInput = filter_var($input, FILTER_SANITIZE_STRING);
// Process the sanitized input
// ...
It is important to note that workarounds should only be considered as temporary measures and upgrading to the latest version is still the recommended solution.
Conclusion
The XSS vulnerability in SilverStripe CMS versions before 3.1.16 and 3.2.0 before 3.2.1 can be a serious security risk, allowing remote attackers to inject malicious web script or HTML. It is crucial to upgrade to the latest version of SilverStripe CMS to ensure the security of your application. Implementing input validation and output encoding techniques can provide temporary protection until the upgrade is performed. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
SilverStripe CMS is a content management system and framework used for building websites and web applications. It provides a user-friendly interface for managing content and has a wide range of features and functionalities.
Cross-site scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. This can lead to various security risks, including session hijacking, data theft, and unauthorized actions on the affected website or application.
The XSS vulnerability in SilverStripe CMS can be exploited by remote attackers who can manipulate the 'Locale' or 'FailedLoginCount' parameters in the 'ItemEditForm' endpoint. By injecting malicious web script or HTML, the attacker can execute arbitrary code in the context of the affected user's browser.
The potential consequences of this vulnerability include session hijacking, data theft, and unauthorized actions on the affected website or application. An attacker can use the XSS vulnerability to execute malicious code in the context of the user's browser, potentially compromising sensitive information and performing unauthorized actions.
To protect your SilverStripe CMS installation from this vulnerability, it is recommended to upgrade to the latest version (3.1.16 or later for versions before 3.1.16, and 3.2.1 or later for versions before 3.2.0). Additionally, implementing input validation and output encoding techniques can help mitigate the risk of XSS attacks.
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