{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "silverstripe/framework"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.1.0"
            },
            {
              "fixed": "3.1.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-05-23T16:59:25Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "A potential hostname injection vulnerability has been found which could allow attackers to alter url resolution.\n\nIf a request contains the X-Forwarded-Host HTTP header a website would then use its value in place of the actual HTTP hostname. In cases where caching is enabled, this could allow an attacker to potentially embed a remote url as the base_url for any site. This would then cause other visitors to the site to be redirected unknowingly.\n\nThis header is necessary for servers running behind a reverse proxy (such as nginx). Such servers are likely not vulnerable to this risk.\n\nA fix has been merged into the default installer, although existing projects which do not run behind a reverse proxy should update their htaccess as below:\n```\n\u003cIfModule mod_headers.c\u003e\n    # Remove X-Forwarded-Host header sent as a part of any request from the web\n    RequestHeader unset X-Forwarded-Host\n\u003c/IfModule\u003e\n```",
  "id": "GHSA-25gq-jvx2-vg9x",
  "modified": "2024-05-23T16:59:26Z",
  "published": "2024-05-23T16:59:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/silverstripe/silverstripe-framework/commit/75137dbab28c0efd28b07e50044a50c5af4e46aa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/SS-2015-013-1.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/silverstripe/silverstripe-framework"
    },
    {
      "type": "WEB",
      "url": "https://www.silverstripe.org/software/download/security-releases/ss-2015-013"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Silverstripe X-Forwarded-Host request hostname injection"
}