Facebook is dismissing Vulnerability-related.DiscoverVulnerability claims Vulnerability-related.DiscoverVulnerability by a researcher who says Vulnerability-related.DiscoverVulnerability multimedia content such as audio-based messages sent via its Facebook Messenger service can be intercepted by a third-party under certain conditions . On Tuesday , Mohamed Baset , a security analyst at ecommerce firm Linio México , published Vulnerability-related.DiscoverVulnerability a proof-of-concept video demonstrating what he calls Vulnerability-related.DiscoverVulnerability a Facebook flaw that allows an attacker to access audio or video files from Facebook servers and play them back . Facebook is dismissing Vulnerability-related.DiscoverVulnerability Baset ’ s claims Vulnerability-related.DiscoverVulnerability , telling Threatpost , “ We appreciate researcher reports , but this is not a flaw and does not impact the normal functioning of voice clips on Messenger ” . Baset concedes that the alleged threat he illustrates represents a “ narrow attack surface ” and is “ not really that dangerous for most users ” .