CVE-2026-40565

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's 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.

Score

CVSS 3.1 6.1 Medium

Status

Analyzed - security-advisories@github.com

Published

2026-04-21

Last modified

2026-04-21

Weaknesses

CWE-79

Affected products

• Freescout (Freescout)
• Freescout (Freescout-help-desk)

References

• https://github.com/freescout-help-desk/freescout/commit/265379b3ae343f06846adc0aa8510643d1eac2df
• https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213
• https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp