wp_get_theme() returns the ThemeURI and AuthorURI but cannot access them.

[kcssm]

$theme = wp_get_theme(); returns the whole array with all the required data, but we cannot access $theme->AuthorURI, $theme->ThemeURI from that array. Not sure if this WordPress bug or not. But it doesnot work in Twentyeleven theme too.

AuthorURI and ThemeURI have never been accessible properties when getting the current theme (current_theme_info() in 3.3).

To get these values you should use the get() method:

$theme = wp_get_theme();
$theme->get('AuthorURI');