{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53599",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-09T19:39:52.404Z",
        "datePublished": "2026-07-31T19:43:15.663Z",
        "dateUpdated": "2026-07-31T21:39:28.144Z"
    },
    "containers": {
        "cna": {
            "title": "Redaxo has a Mediapool isAllowedExtension bypass via multi-segment filename that leads to authenticated RCE on Apache mod_php multi-extension handlers",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-434",
                            "lang": "en",
                            "description": "CWE-434: Unrestricted Upload of File with Dangerous Type",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25"
                },
                {
                    "name": "https://github.com/redaxo/core/pull/6538",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/redaxo/core/pull/6538"
                },
                {
                    "name": "https://github.com/redaxo/core/commit/462e36896bb65d292ba22d711044c23c9cfb0340",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/redaxo/core/commit/462e36896bb65d292ba22d711044c23c9cfb0340"
                },
                {
                    "name": "https://github.com/redaxo/core/releases/tag/5.21.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/redaxo/core/releases/tag/5.21.1"
                }
            ],
            "affected": [
                {
                    "vendor": "redaxo",
                    "product": "core",
                    "versions": [
                        {
                            "version": ">= 5.18.2, < 5.21.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-31T19:43:15.663Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1."
                }
            ],
            "source": {
                "advisory": "GHSA-98pp-vccm-qm25",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-31T20:11:41.826930Z",
                                "id": "CVE-2026-53599",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-31T21:39:28.144Z"
                }
            }
        ]
    }
}