CVE-2026-35584

Medium

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, the endpoint GET /thread/read/{conversation_id}/{thread_id} does not require authentication and does not validate whether the given thread_id belongs to the given conversation_id. This allows any unauthenticated attacker to mark any thread as read by passing arbitrary IDs, enumerate valid thread IDs via HTTP response codes (200 vs 404), and manipulate opened_at timestamps across conversations (IDOR). This vulnerability is fixed in 1.8.212.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreescout

PublishedApr 7, 2026

First seenApr 7, 2026

Weakness typeCWE-306Missing authentication for critical function CWE-639Authorization bypass through user-controlled key

How to fix

Update

freescout freescout1.8.212 or later

Affected products

Product	Affected versions	Fixed in
freescout freescout	v < 1.8.212	1.8.212

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