The vulnerability of the Mail function in the MyBB forum creation software allows a hacker to gain unauthorized access to protected information.

The vulnerability of the Mail function in the MyBB forum creation software is related to insufficient testing of requests on the server side. Exploiting this vulnerability can allow an attacker, operating remotely, to gain unauthorized access to protected information...

security flaw

The mail function in PHP 4.x to 4.2.2 does not filter ASCII control characters from its arguments, which could allow remote attackers to modify mail message content, including mail headers, and possibly use PHP as a "spam proxy."...

security flaw

Argument injection vulnerability in the mail function for PHP 4.x to 4.2.2 may allow attackers to bypass safe mode restrictions and modify command line arguments to the MTA e.g. sendmail in the 5th argument to mail, altering MTA behavior and possibly executing commands...