Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
File upload requires a user session in typical helpdesk deployments, making PR:L more accurate than PR:N; no C/I impact applies.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
2DescriptionCVE.org
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.224, the FreeScout helpdesk application does not enforce rate limiting on the file upload endpoint. Any user can flood the server with upload requests, leading to database overload and potential denial of service for all users. Version 1.8.224 contains a fix.
AnalysisAI
Uncontrolled resource consumption in FreeScout's file upload endpoint allows any user to flood the server with upload requests, overloading the database and causing denial of service for all platform users on versions prior to 1.8.224. The root cause is the complete absence of rate limiting on the upload route - a low-complexity, network-accessible weakness requiring no special privileges per the CVSS vector. No public exploit code or CISA KEV listing exists at time of analysis, but the trivial exploitation mechanics mean any motivated user can weaponize this without tooling.
Technical ContextAI
FreeScout is an open-source PHP helpdesk application built on the Laravel framework, used for shared inbox and ticket management. The vulnerability maps to CWE-400 (Uncontrolled Resource Consumption): without throttling on the file upload HTTP endpoint, repeated POST requests can saturate server-side resources - each upload likely triggers one or more database write operations for metadata, attachment indexing, or audit logging, creating compounding database load under flood conditions. The affected scope covers all FreeScout versions prior to 1.8.224, as indicated by the CPE cpe:2.3:a:freescout-help-desk:freescout:*:*:*:*:*:*:*:*, with no version range floor specified, suggesting all historical releases are affected. The fix introduces rate limiting controls on this endpoint in version 1.8.224.
RemediationAI
Upgrade FreeScout to version 1.8.224 or later, which introduces rate limiting on the file upload endpoint as the primary fix per the vendor advisory at https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-ph4f-2jhx-q76w. If immediate patching is not feasible, configure rate limiting at the reverse proxy layer (nginx's limit_req or Apache's mod_ratelimit) targeting the upload route specifically - this adds protection without application changes but requires knowledge of the exact upload endpoint path and may require tuning to avoid blocking legitimate high-volume users. A WAF rule restricting upload request frequency per source IP is a viable interim control, though distributed attacks may bypass IP-based throttling. Note that none of these compensating controls address the root cause within the application and should not substitute for patching.
File upload bypass in FreeScout 1.8.206 — patch bypass for CVE-2026-27636. PoC and patch available. CVSS 10.0.
Remote code execution in FreeScout prior to version 1.8.206 allows authenticated users to upload `.htaccess` files that
Predictable password reset tokens in FreeScout help desk before 1.8.206. Weak random number generation allows attackers
Anonymous account takeover in FreeScout help desk before 1.8.224 lets an unauthenticated attacker seize the lowest-id ac
FreeScout is a self-hosted help desk and shared mailbox. Rated critical severity (CVSS 9.0), this vulnerability is remot
FreeScout is a self-hosted help desk and shared mailbox. Rated high severity (CVSS 8.0), this vulnerability is remotely
FreeScout is an open source help desk and shared inbox built with PHP. Rated high severity (CVSS 7.1), this vulnerabilit
FreeScout is a free, self-hosted help desk and shared mailbox. Rated medium severity (CVSS 6.3), this vulnerability is r
FreeScout is a free, self-hosted help desk and shared mailbox. Rated medium severity (CVSS 6.1), this vulnerability is r
A stored cross-site scripting (XSS) vulnerability exists in FreeScout help desk software versions 1.8.208 and below, whe
Arbitrary file write in FreeScout (prior to 1.8.215) allows authenticated administrators to achieve remote code executio
Unauthenticated account takeover in FreeScout versions prior to 1.8.217 allows remote attackers to gain permanent access
Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46095