CVE-2026-41906: CWE-639: Authorization Bypass Through User-Controlled Key in freescout-help-desk freescout
CVE-2026-41906 is an authorization bypass vulnerability in FreeScout versions prior to 1.8.214. It allows a low-privileged agent to associate a visible conversation with a hidden customer from another mailbox by exploiting the backend conversation_change_customer action, which improperly accepts any supplied customer_email. The issue arises because the frontend correctly filters customers by mailbox scope, but the backend does not enforce this restriction. This vulnerability has been patched in version 1.8.214.
AI Analysis
Technical Summary
FreeScout, a PHP Laravel-based help desk system, had an authorization bypass vulnerability (CWE-639) in versions before 1.8.214. The Change Customer modal frontend restricts customer visibility by mailbox, but the backend conversation_change_customer action accepts any customer_email parameter without verifying mailbox scope. This flaw enables a low-privileged agent to reassign conversations to customers outside their mailbox scope, potentially leading to unauthorized data access or manipulation. The vulnerability is addressed in FreeScout version 1.8.214.
Potential Impact
An attacker with low privileges can bypass authorization controls to associate conversations with customers from mailboxes they should not access. This can lead to unauthorized information disclosure (confidentiality impact rated as low) and unauthorized modification of conversation data (integrity impact rated as high). Availability is not affected. The CVSS 3.1 base score is 7.1 (high severity), reflecting network attack vector, low attack complexity, and no user interaction required.
Mitigation Recommendations
This vulnerability has been patched in FreeScout version 1.8.214. Users should upgrade to version 1.8.214 or later to remediate this issue. No other mitigation or workaround is indicated in the available data.
CVE-2026-41906: CWE-639: Authorization Bypass Through User-Controlled Key in freescout-help-desk freescout
Description
CVE-2026-41906 is an authorization bypass vulnerability in FreeScout versions prior to 1.8.214. It allows a low-privileged agent to associate a visible conversation with a hidden customer from another mailbox by exploiting the backend conversation_change_customer action, which improperly accepts any supplied customer_email. The issue arises because the frontend correctly filters customers by mailbox scope, but the backend does not enforce this restriction. This vulnerability has been patched in version 1.8.214.
CVSS v3.1
Score 7.1high
Affected software
pkg:github/freescout-help-desk/freescoutRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
FreeScout, a PHP Laravel-based help desk system, had an authorization bypass vulnerability (CWE-639) in versions before 1.8.214. The Change Customer modal frontend restricts customer visibility by mailbox, but the backend conversation_change_customer action accepts any customer_email parameter without verifying mailbox scope. This flaw enables a low-privileged agent to reassign conversations to customers outside their mailbox scope, potentially leading to unauthorized data access or manipulation. The vulnerability is addressed in FreeScout version 1.8.214.
Potential Impact
An attacker with low privileges can bypass authorization controls to associate conversations with customers from mailboxes they should not access. This can lead to unauthorized information disclosure (confidentiality impact rated as low) and unauthorized modification of conversation data (integrity impact rated as high). Availability is not affected. The CVSS 3.1 base score is 7.1 (high severity), reflecting network attack vector, low attack complexity, and no user interaction required.
Mitigation Recommendations
This vulnerability has been patched in FreeScout version 1.8.214. Users should upgrade to version 1.8.214 or later to remediate this issue. No other mitigation or workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-22T15:11:54.672Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fcdf2dcbff5d86101f12e8
Added to database: 05/07/2026, 18:51:25 UTC
Last enriched: 05/15/2026, 10:58:52 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 68
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