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Multiple vulnerabilities in Cisco Webex could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. These vulnerabilities are due to improper filtering of user-supplied input. An attacker could exploit these vulnerabilities by persuading a user to follow a malicious link. A successful exploit could allow the attacker to conduct a cross-site scripting attack against the targeted user. Cisco has addressed these vulnerabilities in the service, and no customer action is necessary to update on-premises software or devices. There are no workarounds that address the vulnerabilities.