Cisco Desk/IP/Video Phone Cross Site Scripting (cisco-sa-phone-dos-FPyjLV7A) (CVE-2025-20351)

medium Nessus Plugin ID 271390

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, the remote Cisco Desk, IP, or Video Phone running SIP Software is affected by a cross site scripting vulnerability:

- 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 nterface 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.
(CVE-2025-20351)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwn51683, CSCwn58671, CSCwn58673, CSCwn58674, CSCwn58676, CSCwn58683, CSCwn58684, CSCwn58685, or CSCwn58687.

Plugin Details

Severity: Medium

ID: 271390

File Name: cisco-sa-phone-dos-FPyjLV7A_CVE-2025-20351.nasl

Version: 1.1

Type: combined

Family: CISCO

Published: 10/24/2025

Updated: 10/24/2025

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2025-20351

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vulnerability Information

CPE: x-cpe:/h:cisco:ip_phone, x-cpe:/o:cisco:ip_phone

Required KB Items: installed_sw/Cisco IP Phone, Settings/ParanoidReport

Patch Publication Date: 10/15/2025

Vulnerability Publication Date: 10/15/2025

Reference Information

CVE: CVE-2025-20351

CISCO-SA: cisco-sa-phone-dos-FPyjLV7A

IAVA: 2025-A-0783

CISCO-BUG-ID: CSCwn51683, CSCwn58671, CSCwn58673, CSCwn58674, CSCwn58676, CSCwn58683, CSCwn58684, CSCwn58685, CSCwn58687

Detections

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