Desk Phone 9841 With Multiplatform Firmware CVE-2024-20533

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 6800, 7800, and 8800 Series, and Cisco Video Phone 8875 with Cisco Multiplatform Firmware could allow an authenticated, remote attacker to conduct stored cross-site scripting (XSS) attacks against users. This vulnerability exists because the web UI of an affected device does not properly validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. Note: To exploit this vulnerability, Web Access must be enabled on the phone and the attacker must have Admin credentials on the device. Web Access is disabled by default. Affected products include: Cisco Desk Phone 9841 With Multiplatform Firmware, Cisco Desk Phone 9851 With Multiplatform Firmware, Cisco Desk Phone 9861 With Multiplatform Firmware, Cisco Desk Phone 9871 With Multiplatform Firmware, Cisco Ip Phone 6821 With Multiplatform Firmware.