CVE-2026-41160

Summary

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.

Affected Software

Weaknesses

• CWE-284: CWE-284: Improper Access Control
• CWE-639: CWE-639: Authorization Bypass Through User-Controlled Key
• CWE-862: CWE-862: Missing Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/espocrm/espocrm/security/advisories/GHSA-c3rm-m24p-255p

References

• https://github.com/espocrm/espocrm/security/advisories/GHSA-c3rm-m24p-255p

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