---
id: CVE-2021-27904
title: An issue was discovered in app/Model/SharingGroupServer.php in MISP 2.4.139
summary: >-
  An issue was discovered in app/Model/SharingGroupServer.php in MISP 2.4.139.
  In the implementation of Sharing Groups, the "all org" flag sometimes provided
  view access to unintended actors.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
vendor: misp-project
product: misp
affected:
  - misp <= 2.4.139
published: '2021-03-02'
updated: '2026-06-22'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-27904'
references:
  - url: >-
      https://github.com/MISP/MISP/commit/ca13fee271ad126832c88896776f3050a6c06e64
    label: cve@mitre.org
  - url: >-
      https://github.com/MISP/MISP/commit/ca13fee271ad126832c88896776f3050a6c06e64
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0029
epssPercentile: 0.192
ingestedAt: '2026-06-29T13:24:33.472Z'
---

## Overview

An issue was discovered in app/Model/SharingGroupServer.php in MISP 2.4.139. In the implementation of Sharing Groups, the "all org" flag sometimes provided view access to unintended actors.

## Affected

- `misp <= 2.4.139`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.