The permission is still available via UploadWizard extension.json#L45 and I do not see revokes via InitialiseSettings.php

It seems it may have broken around the time it was switched to extension registration

This is not commons: specific - see also test2wiki, same problem.

Interesting. I note that $wgAddGroups is overridden in InitialiseSettings:

'wgAddGroups' => [
	...
	'+commonswiki' => [
		'bureaucrat' => [ 'gwtoolset', 'ipblock-exempt', 'translationadmin' ], // T26374, T65124, T78814
		'checkuser' => [ 'ipblock-exempt' ],
		'sysop' => [ 'rollbacker', 'confirmed', 'patroller', 'autopatrolled', 'filemover', 'Image-reviewer' ],
		'Image-reviewer' => [ 'Image-reviewer' ],
	],
	...
],

Perhaps things run in a different order now, and this overrides the setting from UploadWizard? I suppose we could just add it back.

(It still works for me locally, so this has to be something specific to WMF config.)

Change 301371 had a related patch set uploaded (by Bartosz Dziewoński):
Add 'upwizcampeditors' to $wgAddGroups, $wgRemoveGroups for commonswiki

https://gerrit.wikimedia.org/r/301371

I scheduled this change for SWAT deployment in half an hour (https://wikitech.wikimedia.org/wiki/Deployments#deploycal-item-20160727T1500). It would be great if some Commons sysop could be on #wikimedia-operations on IRC at the time to verify that it's fixed.

Change 301371 merged by jenkins-bot:
Add 'upwizcampeditors' to $wgAddGroups, $wgRemoveGroups for commonswiki

https://gerrit.wikimedia.org/r/301371

This should now be fixed on Commons (but not on other wikis, if there are any using campaigns) – @Steinsplitter or anyone, can you please confirm?

In T141431#2499093, @matmarex wrote:

This should now be fixed on Commons (but not on other wikis, if there are any using campaigns) – @Steinsplitter or anyone, can you please confirm?

Works, thanks :-)

(I would like to keep this open until we fix the defaults and can revert https://gerrit.wikimedia.org/r/301371.)

@matmarex Any update on this?