{"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":"2026-08-28T15:58:28.067Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T15:45:52.816811Z","id":"CVE-2026-54721","options":[{"Exploitation":"none"},{"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":"2026-08-28T15:58:28.067Z"}}]}}