Security Advisory

CVE-2026-40565

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-04-21 15:52:39

Last updated 2026-04-21 19:48:40

Assigner GitHub_M

State PUBLISHED

Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScouts linkify() function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters (") in the URL. HTMLPurifier (called first via getCleanBody()) preserves literal " characters in text nodes. linkify() then wraps URLs including those " chars inside an unescaped href="..." attribute, breaking out of the href and injecting arbitrary HTML attributes. Version 1.8.213 fixes the issue.

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