CVE-2021-33199 : Exploit Details and Defense Strategies

In Expression Engine before version 6.0.3, a vulnerability exists in the addonIcon component of mod.file.php, which relies on untrusted input values instead of fixed file names.

Understanding CVE-2021-33199

This CVE identifies a security flaw in Expression Engine that can be exploited by attackers.

What is CVE-2021-33199?

The vulnerability in Expression Engine before 6.0.3 allows an attacker to manipulate input values, leading to potential security risks.

The Impact of CVE-2021-33199

The impact of this CVE could result in unauthorized access, data compromise, or other malicious activities targeting systems using Expression Engine.

Technical Details of CVE-2021-33199

This section delves into specific technical aspects of the CVE.

Vulnerability Description

The vulnerability in the addonIcon component of mod.file.php allows reliance on untrusted input values, creating a security risk.

Affected Systems and Versions

All versions of Expression Engine prior to 6.0.3 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the 'file' input value in addonIcon, instead of using the predefined file names.

Mitigation and Prevention

Taking immediate action and implementing long-term security measures are crucial in addressing this vulnerability.

Immediate Steps to Take

Users are advised to update Expression Engine to version 6.0.3 or apply patches provided by the vendor to mitigate the risk.

Long-Term Security Practices

Implementing secure coding practices and regularly monitoring for updates and patches can enhance the overall security posture.

Patching and Updates

Regularly check for security updates and apply patches promptly to prevent exploitation of known vulnerabilities.