EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes_CVE-2026-41160

{
    "lastseen": "",
    "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.",
    "published": "2026-05-28T16:24:19.970Z",
    "modified": "2026-05-28T16:24:19.970Z",
    "type": "cve",
    "title": "EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes",
    "source": "GitHub_M",
    "references": "https://github.com/espocrm/espocrm/security/advisories/GHSA-c3rm-m24p-255p",
    "id": "CVE-2026-41160",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284",
        "CWE-639",
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "espocrm espocrm < 9.3.5",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "espocrm",
    "version": "< 9.3.5",
    "vendor": "espocrm",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}