CVE-2026-62854

HighCVSS 7.6/10Last modified Nov 11, 2026

Description

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.225, a user who can edit a mailbox signature can combine a scriptable file uploaded through /uploads/upload with nested tag fragments that bypass Helper::stripDangerousTags(). The resulting external script is served from the same origin, so the script-src 'self' policy permits it when another user opens the affected mailbox reply editor or new-ticket page. The script executes with the victim's FreeScout privileges and can read visible data and perform same-origin actions. This issue is fixed in version 1.8.225.

Metrics

CVSS 3.1 7.6/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
freescout-help-desk	freescout	< 1.8.225

References

Timeline

Published: Nov 6, 2026
Last modified: Nov 11, 2026
NVD status: Received

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