Improper Control of Generation of Code ('Code Injection')
Eval injection vulnerability in sessions.inc in PHP Base Library (PHPLib) before 7.4a, when index.php3 from the PHPLib distribution is available on the server, allows remote attackers to execute arbitrary PHP code by including a base64-encoded representation of the code in a cookie. NOTE: this description was significantly updated on 20060605 to reflect new details after an initial vague advisory.
CWE-94 - Code Injection
Code injection is a type of vulnerability that allows an attacker to execute arbitrary code. This vulnerability fully compromises the machine and can cause a wide variety of security issues, such as unauthorized access to sensitive information, manipulation of data, denial of service attacks etc. Code injection is different from command injection in the fact that it is limited by the functionality of the injected language (e.g. PHP), as opposed to command injection, which leverages existing code to execute commands, usually within the context of a shell.