FreeScout: Server-side request forgery via incomplete outbound host validation and unguarded download sinks
CVSS score
8.2
EPSS probability
%0.3
Risk score
0.0
Published
1 d ago
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Impact on My Inventory
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
Incomplete outbound host validation and unguarded download sinks in FreeScout lead to a server-side request forgery (SSRF) vulnerability. This flaw allows an authenticated user to reach loopback and internal network addresses.
An authenticated attacker can access internal network services, retrieve internal HTTP responses, and establish a blind internal port oracle.
What should be done?
- Update FreeScout to version 1.8.230 or a later secure version.
- Follow the vendor advisory for update instructions.
Chain of evidence and sources
FreeScout 1.8.230 öncesi sürümlerde, birden fazla dış giden yol kısıtlı ana bilgisayar politikasını tutarlı bir şekilde uygulamamaktadır.
Yetkili bir yönetici veya posta kutusu ayarlarını değiştirebilen bir kullanıcı, saldırgan tarafından kontrol edilen URL'leri sağlayabilir.
Show the technical text from the sources
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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L
CWE: CWE-918
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-85743 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | freescout-help-desk | freescout | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.2 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L | CVE CNA |
| 8.2 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-85743 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-85743 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
CVSS Vector Radar Chart
8.2 / 10Vulnerability Scoring Details
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:LYama durumu bilinmiyor
Weakness Type (CWE & CAPEC)
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