CVE-2023-20265: Cisco IP Dect 110 Firmware

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of a small subset of Cisco IP Phones could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user of an affected interface to view a page containing malicious HTML or script content. 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. To exploit this vulnerability, the attacker must have valid credentials to access the web-based management interface of the affected device.

Affected products

• Cisco IP Dect 110 Firmware: before 5.1.2sr1 (fixed in 5.1.2sr1)
• Cisco IP Dect 210 Firmware: before 5.1.2sr1 (fixed in 5.1.2sr1)
• Cisco Unified IP Phone 6901 Firmware: from 9.0, before 9.3\(1\)sr3 (fixed in 9.3\(1\)sr3)
• Cisco Unified SIP Phone 3905 Firmware: from 9.0, before 9.4\(1\)sr4 (fixed in 9.4\(1\)sr4)

Published 2023-11-21. Last modified 2026-06-17.