{"id":"CVE-2026-54718","aliases":["GHSA-39mm-rwm3-29jp"],"url":"https://o3.security/vulnerability/CVE-2026-54718","summary":"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template","details":"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.","published":"2026-08-27T17:19:51.691Z","modified":"2026-09-11T03:30:57.818952108Z","cvss":{"score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00724,"percentile":0.52303,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symbiote/silverstripe-advancedworkflow","fixedVersion":"6.4.5"},{"ecosystem":"Packagist","name":"symbiote/silverstripe-advancedworkflow","fixedVersion":"7.1.3"},{"ecosystem":"Packagist","name":"symbiote/silverstripe-advancedworkflow","fixedVersion":"7.2.1"}],"fix":{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb","label":"silverstripe/silverstripe-advancedworkflow@28d0b53"},"references":[{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5"},{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3"},{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1"},{"type":"WEB","url":"https://www.silverstripe.org/download/security-releases/cve-2026-54718"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54718.json"},{"type":"ADVISORY","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54718"},{"type":"FIX","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb"},{"type":"FIX","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b"},{"type":"FIX","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629"},{"type":"FIX","url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symbiote/silverstripe-advancedworkflow/CVE-2026-54718.yaml"},{"type":"PACKAGE","url":"https://github.com/silverstripe/silverstripe-advancedworkflow"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-11T03:30:57.818952108Z"}}