CVE-2026-40565

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

6.1 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://github.com/freescout-help-desk/freescout/commit/265379b3ae343f06846adc0aa8510643d1eac2df Patch
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213 Release Notes
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp Vendor Advisory
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*
History

22 Apr 2026, 17:34

Type Values Removed Values Added
CPE cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*
References () https://github.com/freescout-help-desk/freescout/commit/265379b3ae343f06846adc0aa8510643d1eac2df - () https://github.com/freescout-help-desk/freescout/commit/265379b3ae343f06846adc0aa8510643d1eac2df - Patch
References () https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213 - () https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213 - Release Notes
References () https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp - () https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp - Vendor Advisory
First Time Freescout
Freescout freescout

21 Apr 2026, 20:16

Type Values Removed Values Added
References () https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp - () https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp -

21 Apr 2026, 16:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-21 16:16

Updated : 2026-04-22 17:34

NVD link : CVE-2026-40565

Mitre link : CVE-2026-40565

CVE.ORG link : CVE-2026-40565

JSON object : View

Products Affected

freescout

  • freescout
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')