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CVE-2026-48810

FreeScout: Thread Edit Authorization Bypass via Missing Mailbox Check

Published: May 29, 2026Updated: May 29, 2026 Sources: CVE List NVD
NVD MITRE
4.3CVSS
MEDIUM

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.

EPSS Score
0.0%
Top 92.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None

Weaknesses

CWE-285

Affected Products

freescout
freescout-help-desk

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-3w38-h42v-3h6w
github.com

Timeline

Published
May 29, 2026
Last Updated
May 29, 2026

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