{
  "id": "CVE-2023-40033",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2023-08-16T21:15:09.987",
  "lastModified": "2024-11-21T08:18:33.877",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Flarum is an open source forum software. Flarum is affected by a vulnerability that allows an attacker to conduct a Blind Server-Side Request Forgery (SSRF) attack or disclose any file on the server, even with a basic user account on any Flarum forum. By uploading a file containing a URL and spoofing the MIME type, an attacker can manipulate the application to execute unintended actions. The vulnerability is due to the behavior of the `intervention/image` package, which attempts to interpret the supplied file contents as a URL, which then fetches its contents. This allows an attacker to exploit the vulnerability to perform SSRF attacks, disclose local file contents, or conduct a blind oracle attack. This has been patched in Flarum version 1.8.0. Users are advised to upgrade. Users unable to upgrade may disable PHP's `allow_url_fopen` which will prevent the fetching of external files via URLs as a temporary workaround for the SSRF aspect of the vulnerability."
    }
  ],
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        "type": "Secondary",
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          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
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        "exploitabilityScore": 2.8,
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          "attackVector": "NETWORK",
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          "userInteraction": "NONE",
          "scope": "UNCHANGED",
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          "availabilityImpact": "NONE"
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      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
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          "value": "CWE-918"
        }
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  "references": [
    {
      "url": "https://github.com/flarum/framework/commit/d1059c1cc79fe61f9538f3da55e8f42abbede570",
      "source": "security-advisories@github.com",
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      "source": "security-advisories@github.com",
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      "url": "https://github.com/flarum/framework/commit/d1059c1cc79fe61f9538f3da55e8f42abbede570",
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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}