What’s Vulnerable › Vulnerabilities

CVE-2026-48810: FreeScout: Thread Edit Authorization Bypass via Missing Mailbox Check

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-29 · updated 2026-07-22
• Weakness: CWE-285

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.

Affected products

• freescout-help-desk freescout: before 1.8.221

References

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

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