CVE-2026-34443

MEDIUM

FreeScout: SSRF protection bypass via broken CIDR check in checkIpByMask()

Title source: cna

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, checkIpByMask() in app/Misc/Helper.php checks whether the input IP contains a / character. Plain IP addresses never contain /, so the function always returns false without checking any CIDR ranges. The entire 10.0.0.0/8 and 172.16.0.0/12 private ranges are unprotected. This issue has been patched in version 1.8.211.

References (3)

Scores

CVSS v3 5.3
EPSS 0.0004
EPSS Percentile 10.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (2)
freescout/freescout < 1.8.211
freescout-help-desk/freescout < 1.8.211
Published Mar 31, 2026
Tracked Since Apr 01, 2026