CVE-2026-9588

HIGH

Authenticated Stored Cross-Site Scripting (XSS) in Switchvox SMB Web Portal

Title source: cna

Description

A stored cross-site scripting (XSS) vulnerability exists in Sangoma Switchvox SMB Edition 8.3 (104997) within the voicemail notification template functionality. The submit_modify_voicemail_template endpoint fails to properly sanitize HTML content supplied by authenticated users, allowing malicious JavaScript supplied through the template_text parameter to be stored server-side and subsequently rendered to other users.

References (2)

Core 2

Core References

Release Notes release-notes

https://sangomakb.atlassian.net/wiki/spaces/Switchvox/pages/1802371073/Switchvox+-+Release+Notes+Version+8.4.0.2+July+14+2026

Third Party Advisory third-party-advisory

https://labs.sra.io/posts/switchvox/

Scores

CVSS v4 7.0

EPSS 0.0024

EPSS Percentile 15.1%

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (1)

Sangoma/Switchvox SMB Edition 8.3 (104997) - 8.4.0.2

Published Jul 17, 2026

Tracked Since Jul 17, 2026