Make WordPress Core

Opened 5 weeks ago

#54354 new defect (bug)

Open_basedir warnings on Classic Post edit screens with TinyMce plugins present, like TinyMce Advanced

Reported by: rembem Owned by:
Milestone: Awaiting Review Priority: normal
Severity: normal Version: 5.8.1
Component: Editor Keywords:
Focuses: Cc:


On Post Edit screens in the backend, multiple of these 2 PHP Warnings are triggered in the conditions described below:

is_file(): open_basedir restriction in effect. File(/en.js) is not within the allowed path(s): 
is_file(): open_basedir restriction in effect. File(/en_dlg.js) is not within the allowed path(s):

These warnings are triggered when:

1/ Open BaseDir restrictions are present on the server.
2/ Classic Editor plugin is used. Possibly also with Classic block in the block editor (not tested)
2/ There is a plugin or theme that adds functionality/buttons to TinyMce, for example if it adds one or more buttons to the editor. This happens for example when the plugin Advanced Editor Tools (previously TinyMCE Advanced) is installed. Many themes add shortcodes to the editor as buttons/dropdowns, etc.

The warnings are caused by line 513 of includes/class-wp-editor.php:

$path = trailingslashit( realpath( $path ) );

Here is checked if a '/langs/' path is present for the TinyMce plugin.
If no '/langs/' path is not present, realpath() returns false, resulting in a $path passed to is_file() that is outside the Open BaseDir allowed paths.

A solution would be to build in a check: not check the language paths, if realpath() === false.


  • I see these warning with QueryMonitor Plugin. See attached screenshot
  • Possibly the warnings are also triggered in the block editor with the Classic block. Did not check. Also because Advanced Editor Tools (previously TinyMCE Advanced) is not working well yet with WP5.8.
  • The warnings are also there in WP 5.7.x as suppressed warnings.
  • The warnings are suppressed in PHP7.x, but not in PHP8

Attachments (1)

warning-class-wp-editor.jpg (234.9 KB) - added by rembem 5 weeks ago.
Screenshot QueryMonitor PHP warning

Download all attachments as: .zip

Change History (1)

5 weeks ago

Screenshot QueryMonitor PHP warning

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