CVE-2026-9588

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

At a glance

Severity: HIGH 7.0
EPSS: EPSS 0.40 % · percentile 35 (2026-10-27)
State: PUBLISHED
Published: 2026-07-17
Updated: 2026-07-17
Assigner: SRA
NVD status: Deferred

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	HIGH 7.0	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	SRA
CVSS 4.0	HIGH 7.0	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	NVD · 57dba5dd-1a03-47f6-8b36-e84e47d335d8 (Secondary)

Weaknesses (CWE)

CWE-79

European references

ENISA EUVD · EUVD-2026-45207
GCVE · GCVE-0-2026-9588

Affected products

Product	Versions
Sangoma · Switchvox SMB Edition	affected 8.3 (104997) < 8.4.0.2

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD