CVE-2020-22840 : What You Need to Know

An open redirect vulnerability in b2evolution CMS version prior to 6.11.6 allows attackers to perform malicious open redirects to an attacker-controlled resource via the redirect_to parameter in email_passthrough.php.

Understanding CVE-2020-22840

This CVE involves a security issue in b2evolution CMS that enables attackers to redirect users to malicious websites.

What is CVE-2020-22840?

The vulnerability in b2evolution CMS version prior to 6.11.6 permits attackers to conduct open redirects to a resource controlled by the attacker using a specific parameter.

The Impact of CVE-2020-22840

This vulnerability can lead to various malicious activities, including phishing attacks, malware distribution, and social engineering exploits.

Technical Details of CVE-2020-22840

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The open redirect vulnerability in b2evolution CMS version prior to 6.11.6 allows attackers to manipulate the redirect_to parameter in email_passthrough.php to redirect users to malicious sites.

Affected Systems and Versions

Affected System: b2evolution CMS
Affected Versions: Versions prior to 6.11.6

Exploitation Mechanism

Attackers exploit the vulnerability by crafting a malicious URL containing the redirect_to parameter pointing to a site under their control.

Mitigation and Prevention

Protecting systems from CVE-2020-22840 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update b2evolution CMS to version 6.11.6 or later to mitigate the vulnerability.
Avoid clicking on suspicious links received via emails or messages.

Long-Term Security Practices

Regularly monitor and update CMS software to patch security vulnerabilities.
Educate users about the risks of clicking on unverified links.

Patching and Updates

Ensure timely installation of security patches and updates provided by b2evolution to address known vulnerabilities.