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CVE-2026-40591

HIGH · CVSS 7.1 EPSS 0.03% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-04-21 · Last synced: 2026-05-18

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-40591
Severity
HIGH
CVSS
7.1
EPSS
0.03%

Original NVD Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the phone-conversation creation flow accepts attacker-controlled `customer_id`, `name`, `to_email`, and `phone` values and resolves the target customer in the backend without enforcing mailbox-scoped customer visibility. As a result, a low-privileged agent who can create a phone conversation in Mailbox A can bind the new Mailbox A phone conversation to a hidden customer from Mailbox B and add a new alias email to that hidden customer record by supplying `to_email`. Version 1.8.214 fixes the vulnerability.