Last modified: 2011-03-13 18:05:21 UTC
This makes for extra work... since no harm is brought in a purge, there is no need for confirmation. It presents with: Clear the cache of this page? [OK button] Purging a page clears the cache and forces the most current revision to appear.
When logged out only.
I believe this has been the case for a very long time: r11671 -> Mon Nov 07 04:14:15 2005: purge requires POST. r11764 -> Mon Nov 21 17:08:11 2005: logged in users exempt from POST requirement. r19195 -> Sat Jan 13 04:25:25 2007: purge change checked from loggedin to a separate right. As far as I can see, no WMF wiki has 'purge' right assigned to '*'. So this bug is INVALID unless you're requesting it for anonymous users?
That's a feature not a bug.