CVE-2025-20351
Last modified
CVE-2025-20351 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Cisco | Desk Phone 9871 Firmware | >= 3.0\(1\), <= 3.2\(1\) | — |
| 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 | Ip Phone 8865 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8865 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 7811 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 7811 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 7821 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 7821 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 7841 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 7841 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 7861 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 7861 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8811 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8811 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8832 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8832 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8841 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8841 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8845 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8845 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8851 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8851 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8861 Firmware | < 14.3\(1\) | — |
| Cisco | Ip Phone 8861 Firmware | 14.3\(1\) | — |
| Cisco | Ip Phone 8821 Firmware | < 11.0\(1\) | — |
| Cisco | Ip Phone 8821 Firmware | 11.0\(0.7\) | Mpp |
| Cisco | Ip Phone 8821 Firmware | 11.0\(1\) | — |
| Cisco | Ip Phone 8821 Firmware | 11.0\(2\) | — |
| Cisco | Ip Phone 8821 Firmware | 11.0\(3\) | — |
| Cisco | Ip Phone 8821 Firmware | 11.0\(4\) | — |
| Cisco | Ip Phone 8821 Firmware | 11.0\(5\) | — |
| Cisco | Ip Phone 8821 Firmware | 11.0\(6\) | — |
| Cisco | Video Phone 8875 Firmware | < 2.3\(1\) | — |
| Cisco | Video Phone 8875 Firmware | >= 3.0\(1\), <= 3.2\(1\) | — |
| Cisco | Video Phone 8875 Firmware | 2.3\(1\) | — |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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