---
id: CVE-2026-85177
title: >-
  CRMEB through 6.0.0 fails to validate message ownership in the edit_message
  handler of MessageSystemController.php, allowing authenticated users to modify
  arbitrary system inbox messages
summary: >-
  CRMEB through 6.0.0 fails to validate message ownership in the edit_message
  handler of MessageSystemController.php, allowing authenticated users to modify
  arbitrary system inbox messages. Attackers can update any message's columns
  includ…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-639
published: '2026-09-03'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:45.643'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85177'
references:
  - url: 'https://github.com/crmeb/CRMEB'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/crmeb/CRMEB/blob/v6.0.0/crmeb/app/api/controller/v1/user/MessageSystemController.php
    label: disclosure@vulncheck.com
  - url: 'https://github.com/crmeb/CRMEB/issues/120'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/crmeb-through-6.0.0-unauthorized-message-modification-via-edit-message
    label: disclosure@vulncheck.com
  - url: 'https://github.com/crmeb/CRMEB/issues/120'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00265
epssPercentile: 0.16372
ingestedAt: '2026-09-23T17:28:14.822Z'
vendor: crmeb
product: CRMEB
affected:
  - CRMEB <= 6.0.0
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-03T14:24:31.776473Z'
---

## Overview

CRMEB through 6.0.0 fails to validate message ownership in the edit_message handler of MessageSystemController.php, allowing authenticated users to modify arbitrary system inbox messages. Attackers can update any message's columns including is_del, look, and uid to delete, mark read, or reassign victim notifications without authorization.

## Remediation

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