GHSA-FCWG-45JH-5QHF

Vulnerability from github – Published: 2022-05-24 17:21 – Updated: 2026-01-12 20:17
VLAI?
Summary
Mattermost Server vulnerable to CSRF if CORS is enabled
Details

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.

Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/mattermost/mattermost-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/mattermost/mattermost-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.10.0-rc1"
            },
            {
              "fixed": "3.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2017-18903"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-12T20:17:23Z",
    "nvd_published_at": "2020-06-19T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.",
  "id": "GHSA-fcwg-45jh-5qhf",
  "modified": "2026-01-12T20:17:23Z",
  "published": "2022-05-24T17:21:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18903"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/312269ad0bd166174f07f9df7391fce714601600"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/4519b03d95e8bfe1b2f74094673ae1a2f39f6b47"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/a18479df0940be8503c9b88993490741793eba9e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mattermost/mattermost"
    },
    {
      "type": "WEB",
      "url": "https://mattermost.com/security-updates"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Mattermost Server vulnerable to CSRF if CORS is enabled"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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