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CVE-2026-48812— FreeScout Allows Unauthenticated Access to Legacy Attachment Files

Quick assessment

Affected
freescout-help-desk freescout
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeScout是FreeScout公司开源的一个使用 PHP(Laravel 框架)构建的超轻量级且功能强大的免费开源帮助台和共享收件箱。 FreeScout 1.8.221之前版本存在授权问题漏洞，该漏洞源于附件下载路由跳过token_type设置为1的附件的令牌认证，由于此路由未经身份验证且文件路径是确定的，可能导致未经身份验证的远程攻击者下载由旧版本创建的任何附件。

CVSS 7.5 · High EPSS 0.63% · P48

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
freescout-help-desk freescout < 1.8.221 affected
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I. Basic Information for CVE-2026-48812

Vulnerability Information
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Vulnerability Title
FreeScout Allows Unauthenticated Access to Legacy Attachment Files
Source: CVE Program / CVE List V5
Vulnerability Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.221, FreeScout's attachment download route skips token authentication for any attachment whose `token_type` is set to `1` (`TOKEN_TYPE_LEGACY`). Because this route is unauthenticated and the file path is deterministic, an unauthenticated remote attacker can download any attachment that was created by an older version of FreeScout without possessing a valid token or session. Version 1.8.221 contains a fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreeScout 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeScout是FreeScout公司开源的一个使用 PHP(Laravel 框架)构建的超轻量级且功能强大的免费开源帮助台和共享收件箱。 FreeScout 1.8.221之前版本存在授权问题漏洞，该漏洞源于附件下载路由跳过token_type设置为1的附件的令牌认证，由于此路由未经身份验证且文件路径是确定的，可能导致未经身份验证的远程攻击者下载由旧版本创建的任何附件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
freescout-help-desk freescout < 1.8.221 -

II. Public POCs for CVE-2026-48812

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7128 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-48812

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Patches & Fixes for CVE-2026-48812 (1)

Vendor Advisories for CVE-2026-48812 (1)

Same Patch Batch · freescout-help-desk · 2026-07-20 · 8 CVEs total

CVE-2026-53595 9.4 CRITICAL FreeScout vulnerable to anonymous account takeover via /user-setup empty invite_hash on My
CVE-2026-53593 8.8 HIGH FreeScout Vulnerable to Authenticated Remote Code Execution via incomplete upload extensio
CVE-2026-53591 8.6 HIGH FreeScout Vulnerable to Unauthenticated Conversation Thread Injection via HMAC Length Bypa
CVE-2026-45295 6.5 MEDIUM FreeScout Vulnerable to Unauthenticated Thread Read-Status Manipulation and Conversation E
CVE-2026-53596 5.3 MEDIUM FreeScout has unrestricted file upload without rate limiting that leads to resource exhaus
CVE-2026-53594 4.9 MEDIUM FreeScout has Arbitrary File Read in App Logs Viewer via Forged Encrypted Path
CVE-2026-53592 4.6 MEDIUM FreeScout vulnerable to prototype pollution in getQueryParam

IV. Related Vulnerabilities

Same product: freescout
Same vendor: freescout-help-desk
Same weakness: CWE-287

V. Comments for CVE-2026-48812

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