CVE-2026-33157

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{"affected": [{"affectedData": [{"product": "cms", "vendor": "craftcms", "versions": [{"status": "affected", "version": ">= 5.6.0, < 5.9.13"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*", "matchCriteriaId": "C315EDAE-A519-409A-873A-E6D840C98A82", "versionEndExcluding": "5.9.13", "versionStartIncluding": "5.6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys (\"as\" and \"on\" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13."}, {"lang": "es", "value": "Craft CMS es un sistema de gesti\u00f3n de contenido (CMS). Desde la versi\u00f3n 5.6.0 hasta antes de la versi\u00f3n 5.9.13, existe una vulnerabilidad de Ejecuci\u00f3n Remota de C\u00f3digo (RCE) en Craft CMS, que puede ser explotada por cualquier usuario autenticado con acceso al panel de control. Esto es una elusi\u00f3n de una correcci\u00f3n anterior. Los parches existentes a\u00f1aden cleanseConfig() a assembleLayoutFromPost() y a varias acciones de FieldsController para eliminar las claves de inyecci\u00f3n de comportamiento/evento de Yii2 ('claves prefijadas con 'as' y 'on'). Sin embargo, el par\u00e1metro fieldLayouts en ElementIndexesController::actionFilterHud() se pasa directamente a FieldLayout::createFromConfig() sin ninguna sanitizaci\u00f3n, lo que permite la misma cadena de ataque de inyecci\u00f3n de comportamiento. Este problema ha sido parcheado en la versi\u00f3n 5.9.13."}], "id": "CVE-2026-33157", "lastModified": "2026-06-17T10:37:02.773", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33157", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-24T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-03-24T18:16:09.590", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/craftcms/cms/commit/97e90b4bdee369c1af3ca77a77531132df240e4e"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/craftcms/cms/releases/tag/5.9.13"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/craftcms/cms/security/advisories/GHSA-2fph-6v5w-89hh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-470"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.6.0,5.9.13)"}}], "enrichment": {"confidence": 83.0, "confidence_source": "matching", "scores": [{"score": 83.0, "source": "matching"}]}, "original": {"product": "cms", "source": "cna", "vendor": "craftcms"}, "product": "craftcms", "vendor": "craftcms"}], "analysis": {"en": {"generated_at": "2026-03-26T19:00:06.069718+00:00", "value": {"mitigation_remediation": ["Upgrade Craft CMS to version 5.9.13 or later", "Confirm that all installations run the patched version", "Restrict control\u2011panel access to trusted users only", "Regularly audit field layouts for unexpected changes", "Monitor logs for suspicious activity related to behavior injection"], "summary": {"action": "Patch Immediately", "impact": "Remote Code Execution via Injected Behavior"}, "threat_synthesis": {"affected_systems": "All installations of Craft CMS running between version 5.6.0 and 5.9.12, inclusive, are vulnerable if they expose a control\u2011panel interface to users. The flaw was fixed in Craft CMS 5.9.13, which cleanses the fieldLayouts parameter in the ElementIndexesController to prevent the injection of behaviors.", "description_and_impact": "A flaw in Craft CMS versions 5.6.0 to 5.9.12 permits an authenticated user with control\u2011panel access to execute arbitrary code on the underlying web server. The issue stems from unsanitized configuration data that allows a malicious \"as\" key to be injected into the field layout system, causing the CMS to instantiate and run arbitrary PHP code. This results in full remote code execution on the host.", "risk_and_exploitability": "The CVSS score of 8.6 denotes high severity, while the EPSS score of less than 1% indicates it has not yet been widely observed in the wild and the vulnerability is not listed in CISA\u2019s KEV catalog. However, the attack requires no advanced privileges beyond a normal authenticated user, meaning the potential impact remains significant. Administrators should therefore treat this as a critical issue and apply the patch immediately or otherwise eliminate the use of affected versions."}}}}, "created": "2026-03-25T11:47:01.302176+00:00", "updated": "2026-03-27T09:20:59.195071+00:00", "vendors": ["craftcms", "craftcms$PRODUCT$craftcms"]}