Scheduled posts delete iframes (filter HTML) on publish

[uplink3r]

This is a follow-up to #22944. I have noticed this bug in WordPress 4.0, it's identical to the one in the mentioned ticket.

[uplink3r]

I discovered it's being caused by a plugin that I wrote but here is the code for the plugin (slightly refactored). Obviously this code should do almost nothing as presented here.

Also it's important to note this bug ONLY happens on scheduled posts going to published, because this happens in wp_cron where the unfiltered_html permission doesn't exist for the guest user running the task.

function do_the_save( $post_id ){
	$content = get_post_field('post_content', $post_id);
	remove_action('save_post', __METHOD__);
	wp_update_post( array('ID' => $post_id, 'post_content' => $content) );
	add_action('save_post', __METHOD__);
}
add_action('save_post', 'do_the_save');

[collinsinternet]

While I was able to duplicate your issue with your code, I do not feel that this is a WP Core issue.

The disconnect happens at wp_update_post() in your code where content gets sanitized. You could remove the 'content_save_pre' filter prior to wp_update_post() to resolve your issue.

remove_filter('content_save_pre', 'wp_filter_post_kses');
wp_update_post( array('ID' => $post_id, 'post_content' => $content) );
add_filter('content_save_pre', 'wp_filter_post_kses');

[johnbillion]

Replying to collinsinternet:

While I was able to duplicate your issue with your code, I do not feel that this is a WP Core issue.

This is definitely a core issue.

This is a duplicate of #19373.

In addition, the tests added in [1174/tests] aren't adequate because the current user object is present, unlike when scheduled posts are published via WP-Cron.