The ynastore-baileys npm package, a fork of the Baileys WhatsApp library, contains malicious code that obfuscates a network destination URL to exfiltrate message-related data. The code reconstructs a URL to a non-associated domain (fiora.nixel.my.id) using decimal char codes to evade source inspection. This malicious endpoint receives data during normal message sending operations, potentially leaking sensitive user information. The issue affects version 1.0.21 of ynastore-baileys. There is no CVSS score or known exploit in the wild reported for this threat.