The way I see it, only the bug owner or the owner's manager (i.e. Someone with the appropriate permissions) should be able to change priorities. Even the reporter shouldn't be able to set the priority a bug is at.
Setting to P1 to prove my point.
Traditionally Bugzilla has mostly allowed anyone to do anything. Fixing that general problem to the satisfaction of a whole range of system is a difficult problem.
-> Bugzilla product, Changing Bugs component, reassigning.
The eclipse.org team would also like to see this enhancement. As submitted by one of our committers: Bug priorities are used by committers for planning purposes. They should not be changed by submitters, which should use the severity field instead. It would be great if there was a way to prevent less priviledged users from changing the priority field. Since Bugzilla does not prevent them from doing it, it is a very common mistake users make.
Just to leave a link (although I don't hope much in the bright future for this bug) ... Red Hat bugzilla would welcome this as well. https://bugzilla.redhat.com/show_bug.cgi?id=456697
There is a patch in https://bugzilla.redhat.com/show_bug.cgi?id=495985#c24 which allows only a specific group to change priority/severity. Might be worth to clean up and pick up, as I see such issues with non-dev reporters all over the place in the several Bugzillas that I triage in (bugzilla.mozilla.org being one of them) and this wastes a lot of time for developers getting tainted results when querying for high priority tickets. CC'ing David as he is the downstream author. (In reply to Matej Cepl from comment #5) > https://bugzilla.redhat.com/show_bug.cgi?id=456697 "You are not authorized to access bug #456697." :)
Given the split nature of this bug, this may be better suited as an extension to Bugzilla.
We say in https://bugzilla.mozilla.org/page.cgi?id=etiquette.html that changing priority unless you're a person working the bug or responsible for making decisions about priority is not allowed. It'd be nice to just implement that part of the CoC. Given this bugs been quiet in the bugzilla component since 2014, I'm moving it to bmo.