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Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.221, while investigating the ThreadPolicy::delete issue reported previously, the same missing mailbox membership check was found in the sibling ThreadPolicy::edit method. A user with the PERM_EDIT_CONVERSATIONS permission who created a message or internal note in Mailbox A can rewrite that thread's body after an administrator removes them from Mailbox A, because the policy checks only authorship and a global permission flag — not current mailbox membership. This vulnerability is fixed in 1.8.221.

PUBLISHED Reserved 2026-05-22 | Published 2026-05-29 | Updated 2026-06-01 | Assigner GitHub_M




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-285: Improper Authorization

Product status

< 1.8.221
affected

References

github.com/...escout/security/advisories/GHSA-3w38-h42v-3h6w exploit

github.com/...escout/security/advisories/GHSA-3w38-h42v-3h6w

cve.org (CVE-2026-48810)

nvd.nist.gov (CVE-2026-48810)

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