CVE-2026-41903— FreeScout IDOR Vulnerability: PERM_EDIT_USERS allows modifying any user's notification subscriptions (incomplete fix of CVE-2025-48472)
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I. Basic Information for CVE-2026-41903
Vulnerability Information
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Vulnerability Title
FreeScout IDOR Vulnerability: PERM_EDIT_USERS allows modifying any user's notification subscriptions (incomplete fix of CVE-2025-48472)
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.217, a user holding the PERM_EDIT_USERS permission (intended for general user-profile editing) can read and modify the notification subscriptions of any other user, including admins, by sending a single POST request. This is a sibling of CVE-2025-48472's notification authorization bypass — the prior fix did not cover this code path. A non-admin attacker can silently disable an admin's email/browser/mobile notifications, suppressing security alerts and conversation-assignment notices. This issue has been patched in version 1.8.217.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeScout 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeScout是FreeScout公司的一个使用 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 1.8.217之前版本存在安全漏洞，该漏洞源于持有PERM_EDIT_USERS权限的用户可通过单个POST请求读取和修改其他用户的通知订阅，可能导致非管理员攻击者静默禁用管理员通知。
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 | < 1.8.217 | - |
II. Public POCs for CVE-2026-41903
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- Release 1.8.217 · freescout-help-desk/freescout · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-41903
Same Patch Batch · freescout-help-desk · 2026-05-07 · 5 CVEs total
| CVE-2026-41902 | 9.1 CRITICAL | FreeScout's user invitation hash never expires: permanent unauthenticated account takeover |
| CVE-2026-41905 | 7.7 HIGH | FreeScout vulnerable to SSRF via Helper::sanitizeRemoteUrl: redirect destination not re-va |
| CVE-2026-41904 | 7.6 HIGH | FreeScout Stored XSS vulnerability in mailbox auto-reply: payload reaches every customer's |
| CVE-2026-41906 | 7.1 HIGH | FreeScout: Conversation Change-Customer Cross-Mailbox Authorization Bypass |
IV. Related Vulnerabilities
Same product: freescout
- CVE-2026-41906
FreeScout: Conversation Change-Customer Cross-Mailbox Author - CVE-2026-41905
FreeScout vulnerable to SSRF via Helper::sanitizeRemoteUrl: - CVE-2026-41904
FreeScout Stored XSS vulnerability in mailbox auto-reply: pa - CVE-2026-41902
FreeScout's user invitation hash never expires: permanent un - CVE-2026-41194
FreeScout's Mailbox OAuth disconnect uses a state-changing G
Same vendor: freescout-help-desk
- CVE-2026-41906
FreeScout: Conversation Change-Customer Cross-Mailbox Author - CVE-2026-41905
FreeScout vulnerable to SSRF via Helper::sanitizeRemoteUrl: - CVE-2026-41904
FreeScout Stored XSS vulnerability in mailbox auto-reply: pa - CVE-2026-41902
FreeScout's user invitation hash never expires: permanent un - CVE-2026-41194
FreeScout's Mailbox OAuth disconnect uses a state-changing G
Same weakness: CWE-863
- CVE-2026-42571
Privilege Escalation Attack affecting Pelican Web UI - CVE-2025-15633
HCL BigFix WebUI is affected by an improper authorization vu - CVE-2026-42296
Argo Workflows has incomplete fix for CVE-2026-31892: hostNe - CVE-2025-66170
Apache CloudStack: Any user can list backups that they shoul - CVE-2026-41689
Wallos: Shared local webhook allowlist lets low-privilege us
V. Comments for CVE-2026-41903
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