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Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the undo-send route `GET /conversation/undo-reply/{thread_id}` checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a shared mailbox, one agent can therefore recall another agent's just-sent reply during the 15-second undo window. Version 1.8.214 fixes the vulnerability.

PUBLISHED Reserved 2026-04-14 | Published 2026-04-21 | Updated 2026-04-21 | Assigner GitHub_M




MEDIUM: 5.9CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

Problem types

CWE-862: Missing Authorization

Product status

< 1.8.214
affected

References

github.com/...escout/security/advisories/GHSA-674v-r6xp-mvp6

github.com/...ommit/c779afdda86fa00a4b85779e034bbfd9ce20c76d

github.com/...scout-help-desk/freescout/releases/tag/1.8.214

cve.org (CVE-2026-40592)

nvd.nist.gov (CVE-2026-40592)

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