CVE-2026-41160— EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-41160
Vulnerability Information
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Vulnerability Title
EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes
Source: CVE Program / CVE List V5
Vulnerability Description
EspoCRM is an open source customer relationship management application. Prior to 9.3.5, a business logic flaw (Broken Access Control) in EspoCRM 9.3.3 allows low-privileged users to pin arbitrary notes without having the required edit permissions for the parent object. Due to a "write first, authorize later" execution flaw in the backend API, even though the server correctly returns a 403 Forbidden error, the targeted note's pinned status is already persistently modified in the database. The root cause lies in the server-side processing of the POST /api/v1/Note/{id}/pin endpoint. In application/Espo/Tools/Stream/Api/PostNotePin.php, the process() method first calls getNote($id) before calling checkParent($note). This vulnerability is fixed in 9.3.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
EspoCRM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EspoCRM是EspoCRM开源的一套开源的基于Web的客户关系管理系统（CRM）。该系统提供销售自动化、社区和客户支持等功能。 EspoCRM 9.3.5之前版本存在安全漏洞，该漏洞源于业务逻辑缺陷，导致低权限用户无需编辑权限即可固定任意笔记。
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
II. Public POCs for CVE-2026-41160
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Vendor Advisories for CVE-2026-41160 (1)
IV. Related Vulnerabilities
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