Access Denied issue using third party extension after SUPEE 6285 installation

Magento has released a new patch SUPEE 6285 on 7th july 2015, they have also launched Magento 1.9.2.0 with all the patches already fixed on the same day.

There was really annoying bug in Magento, thank god they have launched the patch to sort it out, but the problem is now with third party extension you are using on your website.

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