CVE-2025-20351

MEDIUM

Cisco Desk Phone 9800 Series and IP Phone 7800/8800 Series - Unauthenticated Stored Cross-Site Scripting via Web UI

Title source: llm
STIX 2.1

Description

A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 running Cisco SIP Software could allow an unauthenticated, remote attacker to conduct XSS attacks against a user of the web UI. This vulnerability exists because the web UI of an affected device does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. 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, the phone must be registered to Cisco Unified Communications Manager and have Web Access enabled. Web Access is disabled by default.

References (1)

Core 1

Scores

CVSS v3 6.1
EPSS 0.0003
EPSS Percentile 9.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (25)
cisco/desk_phone_9841_firmware 3.0\(1\) - 3.2\(1\)
cisco/desk_phone_9851_firmware 3.0\(1\) - 3.2\(1\)
cisco/desk_phone_9861_firmware 3.0\(1\) - 3.2\(1\)
cisco/desk_phone_9871_firmware 3.0\(1\) - 3.2\(1\)
cisco/ip_phone_7811_firmware 14.3\(1\) (2 CPE variants)
cisco/ip_phone_7811_firmware < 14.3\(1\)
cisco/ip_phone_7821_firmware 14.3\(1\) (2 CPE variants)
cisco/ip_phone_7821_firmware < 14.3\(1\)
cisco/ip_phone_7841_firmware 14.3\(1\) (2 CPE variants)
cisco/ip_phone_7841_firmware < 14.3\(1\)
... and 15 more
Published Oct 15, 2025
Tracked Since Feb 18, 2026