{
  "id": "CVE-2023-34252",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2023-06-14T22:15:09.397",
  "lastModified": "2024-11-21T08:06:51.900",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grav is a flat-file content management system. Prior to version 1.7.42, there is a logic flaw in the `GravExtension.filterFilter()` function whereby validation against a denylist of unsafe functions is only performed when the argument passed to filter is a string. However, passing an array as a callable argument allows the validation check to be skipped. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. The vulnerability can be found in the `GravExtension.filterFilter()` function declared in `/system/src/Grav/Common/Twig/Extension/GravExtension.php`. Version 1.7.42 contains a patch for this issue. End users should also ensure that `twig.undefined_functions` and `twig.undefined_filters` properties in `/path/to/webroot/system/config/system.yaml` configuration file are set to `false` to disallow Twig from treating undefined filters/functions as PHP functions and executing them."
    }
  ],
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        "type": "Secondary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      },
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        "type": "Primary",
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          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
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        "exploitabilityScore": 1.2,
        "impactScore": 5.9
      }
    ]
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  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-184"
        },
        {
          "lang": "en",
          "value": "CWE-1336"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.7.42",
              "matchCriteriaId": "758F84B9-A2EC-45D8-86DD-B309DB02B9AE"
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  "references": [
    {
      "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698",
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ]
    },
    {
      "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074",
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ]
    },
    {
      "url": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec",
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ]
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    {
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w",
      "source": "security-advisories@github.com",
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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}