CVE-2026-28784

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{"affected": [{"affectedData": [{"product": "cms", "vendor": "craftcms", "versions": [{"status": "affected", "version": ">= 5.0.0-RC1, < 5.9.0-beta.1"}, {"status": "affected", "version": ">= 4.0.0-RC1, < 4.17.0-beta.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*", "matchCriteriaId": "FD3AD543-D77F-4B2E-AF8D-1C7C724BD26D", "versionEndExcluding": "4.17.0", "versionStartExcluding": "4.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*", "matchCriteriaId": "81B9164E-4845-4D81-A841-378CE4E32485", "versionEndExcluding": "5.9.0", "versionStartExcluding": "5.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:*", "matchCriteriaId": "610F6DE9-720F-45B3-81D5-18E7F6B090FD", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "CC2F40FC-7C27-456A-B16D-679410D1D5CF", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "FBAA8227-04F8-404C-907B-B0162B325F5A", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "21B28E2C-327A-4CE6-ACAD-97E459712A55", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*", "matchCriteriaId": "1C7461CF-35AB-48E1-88B6-956DAE1D2AB4", "vulnerable": true}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "8D8E02D1-601A-4E2B-B619-4775BFDB72D0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Craft is a content management system (CMS). Prior to 5.8.22 and 4.16.18, it is possible to craft a malicious payload using the Twig map filter in text fields that accept Twig input under Settings in the Craft control panel or using the System Messages utility, which could lead to a RCE. For this to work, you must have administrator access to the Craft Control Panel, and allowAdminChanges must be enabled for this to work, which is against our recommendations for any non-dev environment. Alternatively, you can have a non-administrator account with allowAdminChanges disabled, but you have access to the System Messages utility. Users should update to the patched versions (5.8.22 and 4.16.18) to mitigate the issue."}, {"lang": "es", "value": "Craft es un sistema de gesti\u00f3n de contenidos (CMS). Antes de las versiones 5.8.22 y 4.16.18, es posible crear una carga \u00fatil maliciosa utilizando el filtro map de Twig en campos de texto que aceptan entrada Twig en Ajustes en el panel de control de Craft o utilizando la utilidad Mensajes del Sistema, lo que podr\u00eda conducir a una RCE. Para que esto funcione, debe tener acceso de administrador al Panel de Control de Craft, y allowAdminChanges debe estar habilitado para que esto funcione, lo cual va en contra de nuestras recomendaciones para cualquier entorno que no sea de desarrollo. Alternativamente, puede tener una cuenta no administradora con allowAdminChanges deshabilitado, pero tener acceso a la utilidad Mensajes del Sistema. Los usuarios deben actualizar a las versiones parcheadas (5.8.22 y 4.16.18) para mitigar el problema."}], "id": "CVE-2026-28784", "lastModified": "2026-06-17T10:29:02.320", "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-2026-28784", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-05T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-03-04T17:16:21.853", "references": [{"source": "security-advisories@github.com", "tags": ["Technical Description"], "url": "https://craftcms.com/knowledge-base/securing-craft#set-allowAdminChanges-to-false-in-production"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/craftcms/cms/pull/18208"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/craftcms/cms/security/advisories/GHSA-qc86-q28f-ggww"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1336"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.0.0-RC1,5.9.0-beta.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0-RC1,4.17.0-beta.1)"}}], "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": "2026-04-16T13:31:43.632178+00:00", "value": {"mitigation_remediation": ["Upgrade Craft CMS to version 5.8.22 or later, or 4.16.18 or later; these releases contain the patch for the Twig SSTI flaw.", "If an upgrade is not immediately possible, disable the allowAdminChanges setting in the Craft configuration to block the vulnerable functionality for all users, including administrators.", "Restrict or remove non\u2011administrator access to the System Messages utility. This limitation reduces the attack surface for users who might otherwise exploit the SSTI path via the utility."], "summary": {"action": "Patch Now", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Craft CMS versions prior to 5.8.22 and 4.16.18. The affected product is Craft CMS, maintained by Craftcms:cms, and includes all releases listed such as 4.0.0 (rc1, rc2, rc3) and 5.0.0 (rc1).", "description_and_impact": "Craft CMS is vulnerable to authenticated server\u2011side template injection (SSTI) when the Twig map filter is used in certain text fields within the control panel or the System Messages utility. The weakness can be exploited to execute arbitrary code on the web server, a type of vulnerability categorized as CWE\u20111336. The attack requires an attacker to have credentials with administrator privileges or, alternatively, a non\u2011administrator account that still has access to the System Messages utility while allowAdminChanges is disabled. A successful exploit would compromise the confidentiality, integrity, and availability of the CMS instance and any associated data.", "risk_and_exploitability": "The CVSS score is 8.6, indicating high severity, while the EPSS score is below 1%, suggesting a low likelihood of widespread exploitation at present. The vulnerability is not listed in CISA\u2019s KEV catalog. Exploitation is achievable only by authenticated users with the necessary access levels, implying that limiting non\u2011admin interaction or disabling allowAdminChanges decreases the exploitability. The combination of a high severity rating and limited attack surface results in a moderate overall risk for systems that remain at the affected versions or are deployed in production environments without proper configuration."}}}}, "created": "2026-03-05T09:06:58.074677+00:00", "updated": "2026-04-16T13:45:21.941593+00:00", "vendors": ["craftcms", "craftcms$PRODUCT$craftcms"]}