CVE-2026-9588

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

State: Published
Severity: 7.0 High
Published: Jul 17, 2026
Updated: Jul 17, 2026
Reserved: May 26, 2026

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

CVSS	Score	Vector	Source
4.0	7.0 High	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

Weaknesses

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Affected Products

Product	Versions
Switchvox SMB EditionSangoma	8.3 (104997) to before 8.4.0.2Affected

References

https://sangomakb.atlassian.net/wiki/spaces/Switchvox/pages/1802371073/Switchvox+-+Release+Notes+Version+8.4.0.2+July+14+2026release-notes
https://labs.sra.io/posts/switchvox/third-party-advisory

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