CVE-2021-31583: Sipwise Next Generation Communication Platform

Medium severity, CVSS 5.4. EPSS: 1.1% chance of exploitation in the next 30 days.

Sipwise C5 NGCP WWW Admin version 3.6.7 up to and including platform version NGCP CE 3.0 has multiple authenticated stored and reflected XSS vulnerabilities when input passed via several parameters to several scripts is not properly sanitized before being returned to the user: Stored XSS in callforward/time/set/save (POST tsetname); Reflected XSS in addressbook (GET filter); Stored XSS in addressbook/save (POST firstname, lastname, company); and Reflected XSS in statistics/versions (GET lang).

Affected products

• Sipwise Next Generation Communication Platform: version 3.6.7 only

Published 2021-04-23. Last modified 2026-06-17.