CVE-2023-20181: Cisco SPA500DS Firmware

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco Small Business SPA500 Series IP Phones could allow an unauthenticated, remote attacker to conduct XSS attacks. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected software. 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.

Affected products

• Cisco SPA500DS Firmware: affected versions not specified
• Cisco SPA500S Firmware: affected versions not specified
• Cisco SPA501G Firmware: affected versions not specified
• Cisco SPA502G Firmware: affected versions not specified
• Cisco SPA504G Firmware: affected versions not specified
• Cisco SPA508G Firmware: affected versions not specified
• Cisco SPA509G Firmware: affected versions not specified
• Cisco SPA512G Firmware: affected versions not specified
• Cisco SPA514G Firmware: affected versions not specified
• Cisco SPA525 Firmware: affected versions not specified
• Cisco SPA525G2 Firmware: affected versions not specified
• Cisco SPA525G Firmware: affected versions not specified

Published 2023-08-03. Last modified 2026-06-17.