"Your @WhatsApp groups may not be as secure as you think they are. WhatsApp Group Chat Invite Links, User Profiles Made Public Again on @Google Again," Rajaharia posted on his Twitter account.
"Whatsapp also allows users to generate rich preview links of group chat invites that eventually may allow search engine crawlers to identify the links and then index them for future searches. This issue was apparently fixed by Whatsapp last year after becoming public," he noted.
Rajaharia also stated that WhatsApp removed all of its group invite and profile links from Google Search.
WhatsApp said that they have asked Google not to index such chats and advised users not to share group chat links on publicly accessible websites.
"Since March 2020, WhatsApp has included the "noindex" tag on all deep link pages which, according to Google, will exclude them from indexing. We have given our feedback to Google to not index these chats. As a reminder, whenever someone joins a group, everyone in that group receives a notice and the admin can revoke or change the group invite link at any time," a WhatsApp spokesperson said.