What is CVE-2026-40565?

CVE-2026-40565 is a medium-severity vulnerability in Freescout-help-desk Freescout, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-21.

How severe is CVE-2026-40565?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Freescout-help-desk Freescout

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 char…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Freescout-help-desk Freescout — versions < 1.8.213

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-40565?: CVE-2026-40565 is a medium-severity vulnerability in Freescout-help-desk Freescout, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-21.
How severe is CVE-2026-40565?: Medium severity. CVSS v3 base score is 6.1 out of 10.