{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-77136", "assignerOrgId": "f4fb688c-4412-4426-b4b8-421ecf27b14a", "state": "PUBLISHED", "assignerShortName": "TYPO3", "dateReserved": "2026-08-20T13:10:12.063Z", "datePublished": "2026-08-25T09:00:39.526Z", "dateUpdated": "2026-08-25T09:00:39.526Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f4fb688c-4412-4426-b4b8-421ecf27b14a", "shortName": "TYPO3", "dateUpdated": "2026-08-25T09:00:39.526Z"}, "title": "Server-Side Template Injection in extension \"powermail\" (powermail)", "datePublic": "2026-08-25T09:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1336", "description": "CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine", "type": "CWE"}]}], "affected": [{"vendor": "TYPO3", "product": "Extension \"powermail\"", "collectionURL": "https://packagist.org/", "packageName": "in2code/powermail", "versions": [{"status": "affected", "version": "13.0.0", "lessThan": "13.2.1", "versionType": "semver"}, {"status": "affected", "version": "11.0.0", "lessThan": "12.6.1", "versionType": "semver"}, {"status": "affected", "version": "0", "lessThan": "10.9.3", "versionType": "semver"}], "defaultStatus": "unaffected", "repo": "https://github.com/in2code-de/powermail"}], "descriptions": [{"lang": "en", "value": "The extension passes the raw value of a form field configured as \"This field contains the name of the sender\" directly into a Fluid View as template source, without any sanitization, and renders it. An anonymous, unauthenticated user can submit Fluid template syntax in that field to execute arbitrary Fluid ViewHelpers leading to disclosure of server configuration, environment variables and application source, and potentially remote code execution. Exploitation requires only that a form field is configured as the sender_name field, a common and default-adjacent Powermail configuration. No authentication or user interaction beyond a normal form submission is required. This vulnerability is reported to be actively exploited in the wild.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "The extension passes the raw value of a form field configured as \"This field contains the name of the sender\" directly into a Fluid View as template source, without any sanitization, and renders it. An anonymous, unauthenticated user can submit Fluid template syntax in that field to execute arbitrary Fluid ViewHelpers leading to disclosure of server configuration, environment variables and application source, and potentially remote code execution. Exploitation requires only that a form field is configured as the <code>sender_name</code> field, a common and default-adjacent Powermail configuration. No authentication or user interaction beyond a normal form submission is required. This vulnerability is reported to be actively exploited in the wild."}]}], "references": [{"url": "https://typo3.org/security/advisory/typo3-ext-sa-2026-022", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.5, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}}], "credits": [{"lang": "en", "value": "Antariksha Sharma", "type": "reporter"}, {"lang": "en", "value": "R\u00e9mi Payette", "type": "reporter"}, {"lang": "en", "value": "Office qu\u00e9b\u00e9cois de la langue fran\u00e7aise (OQLF)", "type": "reporter"}, {"lang": "en", "value": "Centre gouvernemental de Cyberd\u00e9fense (CGCD)", "type": "reporter"}, {"lang": "en", "value": "Marcus Schwemer", "type": "remediation developer"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.0"}}}}

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{"created": "2026-08-25T10:45:03.469768+00:00", "updated": "2026-08-25T10:45:03.469782+00:00", "vendors": []}