{"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"}}]}}

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