TI-2026-86039 Aliases CVE-2026-103984

FreeScout incomplete fix exposes cross-visibility customer PII

MEDIUM 62CWE-862Published 2026-11-06 · Updated 2026-11-06

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

FreeScout before 1.8.231 has a missing authorization check (CWE-862) in the load_customer_info AJAX action when limit_user_customer_visibility is enabled. The action looks up a customer by an attacker-supplied email and checks access only against a separately supplied mailbox, so a non-admin agent can retrieve an unrelated customer's profile, including names, email addresses, phone numbers, postal addresses, and confidential internal agent notes. An authenticated agent with low privileges can exploit this remotely. The flaw is not listed in CISA KEV, and the sources report no active exploitation.

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 1.8.231, when limit_user_customer_visibility is enabled, the load_customer_info AJAX action performs a global lookup using an attacker-controlled customer email and checks only whether the agent can access a separately supplied mailbox. A non-admin agent can name an accessible mailbox and retrieve an unrelated customer's rendered profile without invoking CustomerPolicy::view(). The response can expose names, email addresses, phone numbers, company and job information, postal addresses, social profiles, websites, and confidential internal agent notes. This issue is fixed in version 1.8.231.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00395 33rd percentileScored 2026-11-07

Fix Fixed freescout (freescout-help-desk): 1.8.231

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
freescout-help-desk	freescout	before 1.8.231	1.8.231	Patch available	CNA

freescout Vendorfreescout-help-desk Affected before 1.8.231 Fixed in 1.8.231 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 1.8.231, which fixes this issue. The sources list no fix for an earlier release of this issue beyond 1.8.231.

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

Fix · CNA freescout (freescout-help-desk) Fixed in 1.8.231

Timeline

2026-11-06 Threatist record created from CVE-2026-103984
2026-11-06 CISA SSVC decision points changed

References

Other 3

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