CVE-2021-41463 : Security Advisory and Response

A Cross-site scripting (XSS) vulnerability in concrete5-legacy 5.6.4.0 and below allows remote attackers to inject arbitrary web script or HTML via the cID parameter.

Understanding CVE-2021-41463

This CVE involves a security vulnerability in concrete5-legacy versions that could potentially lead to a Cross-site scripting (XSS) attack.

What is CVE-2021-41463?

The CVE-2021-41463 vulnerability pertains to an XSS issue within concrete5-legacy versions where attackers can inject malicious web script or HTML through the cID parameter.

The Impact of CVE-2021-41463

The vulnerability can enable remote attackers to execute arbitrary code in the context of the victim's browser, leading to potential data theft, session hijacking, and unauthorized actions.

Technical Details of CVE-2021-41463

This section delves into specific technical aspects of the CVE.

Vulnerability Description

The vulnerability exists in toos/permissions/dialogs/access/entity/types/group_combination.php in concrete5-legacy 5.6.4.0 and earlier versions, facilitating the injection of malicious web script or HTML via the cID parameter.

Affected Systems and Versions

Product: concrete5-legacy
Vendor: Not available
Versions affected: 5.6.4.0 and below

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specifically crafted requests to the vulnerable component, allowing them to execute XSS attacks.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of the CVE.

Immediate Steps to Take

Update concrete5-legacy to a secure version that includes a patch for the XSS vulnerability.
Employ input validation to sanitize user inputs and prevent XSS attacks.
Regularly monitor and audit web application logs for suspicious activities.

Long-Term Security Practices

Implement secure coding practices to prevent injection vulnerabilities.
Conduct thorough security assessments and penetration testing on web applications.

Patching and Updates

Apply patches provided by concrete5-legacy promptly to address security vulnerabilities and enhance the overall security posture of the system.