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.
History

Thu, 28 May 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Espocrm
Espocrm espocrm
Vendors & Products Espocrm
Espocrm espocrm

Thu, 28 May 2026 17:00:00 +0000

Type Values Removed Values Added
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.
Title EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes
Weaknesses CWE-284
CWE-639
CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-28T16:24:19.970Z

Reserved: 2026-04-17T16:34:45.524Z

Link: CVE-2026-41160

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-28T17:16:22.053

Modified: 2026-05-28T17:16:22.053

Link: CVE-2026-41160

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T18:30:23Z