TI-2026-86037 Aliases CVE-2026-85743

Server-side request forgery in FreeScout reaches internal services

LOW 35CWE-918Published 2026-11-06 · Updated 2026-11-06

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · Low · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

FreeScout before 1.8.230 has a server-side request forgery flaw (CWE-918) because several outbound request paths do not consistently enforce a restricted-host policy. An authenticated administrator, or a user allowed to change mailbox connection settings or trigger module updates or installations, can make the server contact loopback and internal addresses, probe internal ports, and retrieve internal HTTP responses. No unauthenticated attack path is established.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.230, multiple outbound paths in Helper::downloadRemoteFile(), Helper::checkPort(), Helper::sanitizeRemoteUrl(), MailboxesController.php, and ModulesController.php do not consistently enforce a sink-level restricted-host policy. An authenticated administrator, or another authenticated user permitted to change mailbox connection settings or trigger module update or installation paths, can supply attacker-controlled URLs or hosts. The independent download and port-test sinks can reach encoded or otherwise uncovered loopback and internal addresses. The redirect-validation bypass additionally requires a configured whitelist that permits the original and final hosts while a restricted internal host appears only as an intermediate redirect hop. No unauthenticated SSRF path is established. The server can consequently contact loopback and internal services, provide a blind internal port oracle, and retrieve internal HTTP responses into application-controlled download sinks. This issue is fixed in version 1.8.230.

Why it matters now

EPSS 0.00264 18th percentileScored 2026-11-07

Fix Fixed freescout (freescout-help-desk): 1.8.230

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
freescout-help-desk	freescout	before 1.8.230	1.8.230	Patch available	CNA

freescout Vendorfreescout-help-desk Affected before 1.8.230 Fixed in 1.8.230 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:freescout:freescout::::::::	—	—	freescout-help-desk

cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:* Versions — — ·freescout-help-desk

Remediation

Upgrade FreeScout to version 1.8.230, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fix · CNA freescout (freescout-help-desk) Fixed in 1.8.230

Timeline

2026-11-06 Threatist record created from CVE-2026-85743
2026-11-08 Priority changed: MEDIUM → LOW

References

Other 4

TI-2026-38652 FreeScout vulnerable to anonymous account takeover via /user-setup empty invite_hash on MySQL CVSS 3.1CRITICAL 9.4
TI-2026-22019 FreeScout's Predictable Authentication Token Enables Account Takeover CVSS 3.1CRITICAL 9.8
TI-2026-30304 FreeScout's user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks CVSS 3.1CRITICAL 9.1
TI-2026-29249 FreeScout has Authentication Bypass and Information Disclosure in SystemController via /system/cron CVSS 4.0HIGH 8.9
TI-2026-29247 FreeScout has Predictable Attachment Token that Allows Unauthenticated Private File Download via Brute Force CVSS 4.0HIGH 8.8
TI-2026-38648 FreeScout Vulnerable to Unauthenticated Conversation Thread Injection via HMAC Length Bypass in FetchEmails CVSS 3.1HIGH 8.6

See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences