CVE-2021-3256 Explained : Impact and Mitigation

KuaiFanCMS V5.x is identified with an arbitrary file read vulnerability in the html_url parameter of the chakanhtml.module.php file. This CVE was made public on January 13, 2021.

Understanding CVE-2021-3256

This section will cover the essential aspects of CVE-2021-3256 to help users comprehend the severity and impact of this vulnerability.

What is CVE-2021-3256?

CVE-2021-3256 refers to an arbitrary file read vulnerability present in KuaiFanCMS V5.x that can be exploited via the html_url parameter of the chakanhtml.module.php file. Attackers could leverage this flaw to read sensitive files on the system.

The Impact of CVE-2021-3256

The vulnerability can have severe consequences as threat actors may gain unauthorized access to critical files and data, potentially leading to data breaches or unauthorized disclosure of information.

Technical Details of CVE-2021-3256

In this section, we will delve into the technical specifics of CVE-2021-3256 to gain a deeper insight into how the vulnerability functions.

Vulnerability Description

The arbitrary file read vulnerability in KuaiFanCMS V5.x allows malicious actors to read arbitrary files on the system by manipulating the html_url parameter within the chakanhtml.module.php file.

Affected Systems and Versions

All versions of KuaiFanCMS V5.x are affected by this vulnerability.

Exploitation Mechanism

Exploiting this vulnerability involves sending specially crafted requests to the html_url parameter, tricking the application into disclosing sensitive file contents.

Mitigation and Prevention

To safeguard systems from the risks associated with CVE-2021-3256, immediate actions need to be taken to mitigate the threat and prevent exploitation.

Immediate Steps to Take

An immediate measure to mitigate the vulnerability involves restricting access to the affected parameter and ensuring that sensitive files are not exposed to unauthorized entities.

Long-Term Security Practices

Implementing robust file access controls, conducting regular security assessments, and keeping systems updated with the latest patches are crucial for maintaining long-term security.

Patching and Updates

Users are advised to apply security patches provided by KuaiFanCMS promptly to address CVE-2021-3256 and enhance the overall security posture of their systems.