CVE-2026-62854highCWE-79

CVE-2026-62854: falha de alta gravidade em freescout-help-desk freescout

FreeScout: Stored XSS in mailbox signature via same-origin JS upload

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Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.

18Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 7.6
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Produtos afetados
freescout-help-desk · freescout
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