CVE-2026-34443 — FreeScout: SSRF protection bypass via broken CIDR check in checkIpByMask()
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 c…
Published: 2026-03-31 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7