It's true, it's been on CCTV, as follows:

Shanghai People's Broadcasting's "990 Listener Hotline" reported that a Shanghai consumer found live maggots drilled into his Ferrero chocolates when he ate them. The consumer said he bought Ferrero chocolates with a shelf life of December 21, 2011, and was surprised to find live worms crawling out of the chocolates when he opened the package and ate a few of them in mid-November.

Upon inspection, a similar situation was surprisingly found in each of the remaining chocolates. However, Ferrero allegedly offered to "compensate consumers for the leftover chocolates, but not for the ones they ate." In Chengdu, a consumer ate "maggot" Ferrero chocolate during the shelf life.

Expanded

Chocolate production is melted cocoa powder, cocoa butter and some other added east to stir together made, and is a very high temperature, so it is impossible to enter the production of worm eggs in general chocolate, Ferrero has other dried fruits such as almonds may be with the eggs, was wrapped in high temperature after the death, encountered the right temperature or improper storage, theoretically, the maggot in the chocolate. The right temperature or improper storage could theoretically produce worms, and chocolate is a sweet food, if improperly stored for flies to touch it could also produce eggs, and worms could also appear.

CCTV.com - brand-name chocolates frequently produce worms: high-priced Ferrero was exposed to maggots crawling out