I don't think you can, but you can edit other pages. If the top of the page says "view source", it's protected. Only the admins of the wiki can edit. If it does not says "view source", it's not protected, you can edit the page.
And anyway, back on CPTB Wiki, there was a bug. Everytime I click on "random page" or anything else, it said it wouldn't be found. I contacted Wiki, to fix the bug. If the bug is gone, I will leave you a message. Thanks!