{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54721", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-15T23:07:33.231Z", "datePublished": "2026-08-27T16:52:46.023Z", "dateUpdated": "2026-08-27T16:52:46.023Z"}, "containers": {"cna": {"title": "Silverstripe UserForms: Remote code execution via userforms email subject", "problemTypes": [{"descriptions": [{"cweId": "CWE-94", "lang": "en", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/silverstripe/silverstripe-userforms/security/advisories/GHSA-g8wr-r2v2-vqc6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/silverstripe/silverstripe-userforms/security/advisories/GHSA-g8wr-r2v2-vqc6"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/pull/1441", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/pull/1441"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/pull/1442", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/pull/1442"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/commit/23c069866900c19b499bfa997d1e251e97491702", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/commit/23c069866900c19b499bfa997d1e251e97491702"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/commit/c55494ad7c717b199a3c1663b43a54db5d95604c", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/commit/c55494ad7c717b199a3c1663b43a54db5d95604c"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/6.4.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/6.4.9"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.0.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.0.7"}, {"name": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.1.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.1.1"}], "affected": [{"vendor": "silverstripe", "product": "silverstripe-userforms", "versions": [{"version": "< 6.4.9", "status": "affected"}, {"version": ">= 7.0.0, < 7.0.7", "status": "affected"}, {"version": ">= 7.1.0, < 7.1.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-27T16:52:46.023Z"}, "descriptions": [{"lang": "en", "value": "Silverstripe UserForms provides a visual form builder for the Silverstripe CMS. From 6.0.0 until 6.4.9, 7.0.7, and 7.1.1, the userform email recipient subject field in the CMS accepts a specially crafted payload that can be interpreted as executable server-side code. An authenticated CMS user with permission to configure a UserForms email recipient can use the subject field to run arbitrary code on the server, compromising confidentiality, integrity, and availability. This issue is fixed in versions 6.4.9, 7.0.7, and 7.1.1."}], "source": {"advisory": "GHSA-g8wr-r2v2-vqc6", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "silverstripe-userforms", "vendor": "silverstripe", "versions": [{"status": "affected", "version": "< 6.4.9"}, {"status": "affected", "version": ">= 7.0.0, < 7.0.7"}, {"status": "affected", "version": ">= 7.1.0, < 7.1.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Silverstripe UserForms provides a visual form builder for the Silverstripe CMS. From 6.0.0 until 6.4.9, 7.0.7, and 7.1.1, the userform email recipient subject field in the CMS accepts a specially crafted payload that can be interpreted as executable server-side code. An authenticated CMS user with permission to configure a UserForms email recipient can use the subject field to run arbitrary code on the server, compromising confidentiality, integrity, and availability. This issue is fixed in versions 6.4.9, 7.0.7, and 7.1.1."}], "id": "CVE-2026-54721", "lastModified": "2026-08-27T20:17:49.973", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-27T20:17:49.973", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/commit/23c069866900c19b499bfa997d1e251e97491702"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/commit/c55494ad7c717b199a3c1663b43a54db5d95604c"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/pull/1441"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/pull/1442"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/6.4.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.0.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.1.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/silverstripe/silverstripe-userforms/security/advisories/GHSA-g8wr-r2v2-vqc6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}