{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2023-34252",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2023-05-31T13:51:51.174Z",
        "datePublished": "2023-06-14T21:38:48.358Z",
        "dateUpdated": "2024-08-02T16:01:54.351Z"
    },
    "containers": {
        "cna": {
            "title": "Grav Server-side Template Injection via Insufficient Validation in filterFilter",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-184",
                            "lang": "en",
                            "description": "CWE-184: Incomplete List of Disallowed Inputs",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1336",
                            "lang": "en",
                            "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w"
                },
                {
                    "name": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec"
                },
                {
                    "name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698"
                },
                {
                    "name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074"
                }
            ],
            "affected": [
                {
                    "vendor": "getgrav",
                    "product": "grav",
                    "versions": [
                        {
                            "version": "< 1.7.42",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2023-06-14T22:17:06.852Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-96xv-rmwj-6p9w",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-02T16:01:54.351Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "name": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w",
                        "tags": [
                            "x_refsource_CONFIRM",
                            "x_transferred"
                        ],
                        "url": "https://github.com/getgrav/grav/security/advisories/GHSA-96xv-rmwj-6p9w"
                    },
                    {
                        "name": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec",
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/getgrav/grav/commit/244758d4383034fe4cd292d41e477177870b65ec"
                    },
                    {
                        "name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698",
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Twig/Extension/GravExtension.php#L1692-L1698"
                    },
                    {
                        "name": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074",
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1956-L2074"
                    }
                ]
            }
        ]
    }
}