Facebook has addressed a critical vulnerability in WhatsApp, tracked as CVE-2019-18426, that would have allowed hackers to read files from a user’s local file system, on
“A vulnerability in WhatsApp Desktop when paired with WhatsApp for iPhone allows cross-site scripting and local file reading. Exploiting the vulnerability requires the victim to click a link preview from a specially crafted text message.” reads the security advisory published by Facebook.
The issue could be exploited by a remote attacker by tricking the victims into clicking a link preview from a specially crafted text message.
The CVE-2019-18426 flaw affects WhatsApp Desktop p
The vulnerability received an 8.2 high severity CVSS 3
Weizman discovered a gap in WhatsApp’s Content Security Policy (CSP) that allowed for cross-site scripting (XSS) on the desktop app, further analysis allowed the expert to gain read permissions on the local file system on both Windows and
“if you run an old version of a vulnerable app, one can exploit that vulnerability and do bad things to you.” wrote the expert.
The flaw could have allowed attackers to inject malicious code and links within messages sent that would be completely transparent to the victims.
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(SecurityAffairs – United Nations, hacking)