{"id":"CVE-2026-54718","state":"PUBLISHED","title":"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template","description":"Silverstripe Advanced Workflow is a highly configurable step-based workflow module. Prior to 6.4.5, 7.1.3, and 7.2.1, an attacker with permission to author the advanced workflow email template can place a specially crafted server-side template payload in NotifyUsersWorkflowAction.EmailTemplate. When NotifyUsersWorkflowAction renders the field through the Silverstripe template engine SSTemplateParser, the payload can cause PHP evaluation and arbitrary code execution on the server; the regression coverage is in tests/php/WorkflowEngineTest.php. This issue is fixed in versions 6.4.5, 7.1.3, and 7.2.1.","publishedAt":"2026-08-27T17:19:51.691Z","updatedAt":"2026-08-31T18:17:17.110Z","severity":{"score":7.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["silverstripe silverstripe-advancedworkflow"],"affected":[{"vendor":"silverstripe","product":"silverstripe-advancedworkflow","versions":[{"version":"< 6.4.5","status":"affected"},{"version":">= 7.0.0, < 7.1.3","status":"affected"},{"version":">= 7.2.0, < 7.2.1","status":"affected"}]}],"references":["https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp","https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629","https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630","https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb","https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b","https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5","https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3","https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1","https://www.silverstripe.org/download/security-releases/cve-2026-54718"],"weaknesses":["CWE-1336"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54718.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54718","state":"PUBLISHED","datePublished":"2026-08-27T17:19:51.691Z","dateUpdated":"2026-08-31T18:17:17.110Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T23:07:33.231Z"},"containers":{"cna":{"title":"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template","descriptions":[{"lang":"en","value":"Silverstripe Advanced Workflow is a highly configurable step-based workflow module. Prior to 6.4.5, 7.1.3, and 7.2.1, an attacker with permission to author the advanced workflow email template can place a specially crafted server-side template payload in NotifyUsersWorkflowAction.EmailTemplate. When NotifyUsersWorkflowAction renders the field through the Silverstripe template engine SSTemplateParser, the payload can cause PHP evaluation and arbitrary code execution on the server; the regression coverage is in tests/php/WorkflowEngineTest.php. This issue is fixed in versions 6.4.5, 7.1.3, and 7.2.1."}],"affected":[{"vendor":"silverstripe","product":"silverstripe-advancedworkflow","versions":[{"version":"< 6.4.5","status":"affected"},{"version":">= 7.0.0, < 7.1.3","status":"affected"},{"version":">= 7.2.0, < 7.2.1","status":"affected"}]}],"references":[{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629","tags":["x_refsource_MISC"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630","tags":["x_refsource_MISC"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb","tags":["x_refsource_MISC"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b","tags":["x_refsource_MISC"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1","name":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1","tags":["x_refsource_MISC"]},{"url":"https://www.silverstripe.org/download/security-releases/cve-2026-54718","name":"https://www.silverstripe.org/download/security-releases/cve-2026-54718","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1336","lang":"en","description":"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-27T17:19:51.691Z"},"source":{"advisory":"GHSA-39mm-rwm3-29jp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T18:17:05.218921Z","id":"CVE-2026-54718","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-31T18:17:17.110Z"}}]}}}