---
id: CVE-2020-8894
title: An issue was discovered in MISP before 2.4.121
summary: >-
  An issue was discovered in MISP before 2.4.121. ACLs for discussion threads
  were mishandled in app/Controller/ThreadsController.php and
  app/Model/Thread.php.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
vendor: misp-project
product: misp
affected:
  - misp < 2.4.121
patched:
  - misp 2.4.121
published: '2020-02-12'
updated: '2026-06-22'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-8894'
references:
  - url: >-
      https://github.com/MISP/MISP/commit/9400b8bc8699435d84508e598aca98a31affd77c
    label: cve@mitre.org
  - url: 'https://github.com/MISP/MISP/compare/v2.4.120...v2.4.121'
    label: cve@mitre.org
  - url: 'https://zigrin.com/advisories/misp-mishandling-of-discussion-threads-acls/'
    label: cve@mitre.org
  - url: >-
      https://github.com/MISP/MISP/commit/9400b8bc8699435d84508e598aca98a31affd77c
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/MISP/MISP/compare/v2.4.120...v2.4.121'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://zigrin.com/advisories/misp-mishandling-of-discussion-threads-acls/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01399
epssPercentile: 0.71319
ingestedAt: '2026-06-29T13:24:33.442Z'
---

## Overview

An issue was discovered in MISP before 2.4.121. ACLs for discussion threads were mishandled in app/Controller/ThreadsController.php and app/Model/Thread.php.

## Affected

- `misp < 2.4.121`

## Remediation

Upgrade past the affected range:

- `misp 2.4.121`