Affected script: "install-scripts:post-update-cmd"

This script is updating or installing a Git pre-commit hook (pre-commit.php) which can be dangerous because the actual content of the pre-commit.php file is not shown. Git hooks are scripts that Git executes before or after events such as commit, push, etc. If there is any malicious code hidden in this 'pre-commit.php', it can do anything from stealing sensitive information to running harmful commands every time a git commit is made, depending on the user's permissions.

In addition, the file permission is being set to 0777, which gives read, write, and execute permissions to everyone on the file. This could allow any user to modify the pre-commit hook to include malicious code. The vulnerability arises from the open-ended nature of the pre-commit hook and the lack of control or visibility on what that hook actually does.