CVE-2019-19806 Explained : Impact and Mitigation

In the MFScripts YetiShare versions 3.5.2 through 4.5.3, a vulnerability exists in the script _account_forgot_password.ajax.php that discloses whether an email address is linked to a provided account name. This flaw could be exploited by malicious actors to guess email addresses and enumerate existing accounts.

Understanding CVE-2019-19806

This CVE identifies a security issue in the MFScripts YetiShare file hosting script versions 3.5.2 through 4.5.3.

What is CVE-2019-19806?

The vulnerability in the _account_forgot_password.ajax.php script allows attackers to determine if an email address is associated with a given account name, facilitating the enumeration of accounts.

The Impact of CVE-2019-19806

The disclosure of email address associations can lead to the enumeration of existing accounts, potentially aiding attackers in unauthorized access and other malicious activities.

Technical Details of CVE-2019-19806

This section delves into the specifics of the vulnerability.

Vulnerability Description

The _account_forgot_password.ajax.php script in MFScripts YetiShare 3.5.2 through 4.5.3 reveals whether an email address is configured for a provided account name, enabling attackers to guess email addresses and enumerate accounts.

Affected Systems and Versions

Product: MFScripts YetiShare
Versions: 3.5.2 through 4.5.3

Exploitation Mechanism

Attackers can exploit this vulnerability by sending requests to the _account_forgot_password.ajax.php script and analyzing the responses to determine email address associations.

Mitigation and Prevention

Protecting systems from CVE-2019-19806 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable or restrict access to the _account_forgot_password.ajax.php script if not essential.
Monitor for any suspicious activities related to email address enumeration.

Long-Term Security Practices

Regularly update the YetiShare script to the latest version to patch known vulnerabilities.
Implement strong authentication mechanisms to prevent unauthorized access.
Conduct security assessments and penetration testing to identify and address potential weaknesses.
Educate users on the importance of using unique and secure passwords.

Patching and Updates

Ensure timely installation of security patches and updates provided by MFScripts to address the vulnerability in versions 3.5.2 through 4.5.3.