"I came across this bug during a voice call with my friend. The bug used to allow the caller to upgrade it to a video call without the knowledge of the receiver," the 22-year-old engineer said.
"I reported the matter in March to the Bug Bounty Program of Facebook, which deals with the violation of privacy matters. The report was acknowledged by the Facebook Security team the next day and its technical department fixed the bug within 15-20 days," he added.
Facebook, owned by Mark Zuckerberg, had purchased WhatsApp for USD 19 billion in February 2014.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)