CVE-2020-3419

CVE-2020-3419 describes a critical vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server, allowing an unauthenticated, remote attacker to join a Webex session as an invisible participant. This flaw stems from improper handling of authentication tokens, enabling an attacker with meeting join links and passwords to gain full access to audio, video, chat, and screen sharing without appearing on the participant list. With a CVSS score of 9.1 (Critical), this vulnerability has a low attack complexity and requires no user interaction, posing a significant risk of high confidentiality and integrity impact. The attacker can effectively "ghost" into meetings, accessing sensitive information and participating undetected. While there is no evidence of active exploitation (KEV listed as No) and no public exploit code available (Metasploit, Nuclei, ExploitDB are None), the vulnerability has garnered notable community discussion and media coverage, indicating awareness and potential for future exploitation.