{"id":"CVE-2026-54718","title":"Silverstripe Advanced Workflow is a highly configurable step-based workflow module","summary":"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 te…","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-1336","CWE-20"],"vendor":"symbiote","product":"symbiote/silverstripe-advancedworkflow","affected":["symbiote/silverstripe-advancedworkflow < 6.4.5","symbiote/silverstripe-advancedworkflow >= 7.0.0, < 7.1.3","symbiote/silverstripe-advancedworkflow >= 7.2.0, < 7.2.1"],"patched":["symbiote/silverstripe-advancedworkflow 6.4.5","symbiote/silverstripe-advancedworkflow 7.1.3","symbiote/silverstripe-advancedworkflow 7.2.1"],"published":"2026-08-27","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:09:13.080","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54718","references":[{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1","label":"security-advisories@github.com"},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp","label":"security-advisories@github.com"},{"url":"https://www.silverstripe.org/download/security-releases/cve-2026-54718","label":"security-advisories@github.com"},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symbiote/silverstripe-advancedworkflow/CVE-2026-54718.yaml"},{"url":"https://github.com/advisories/GHSA-39mm-rwm3-29jp"}],"tags":["nvd","ghsa","composer"],"epss":0.00724,"epssPercentile":0.52611,"aliases":["GHSA-39mm-rwm3-29jp"],"ecosystem":"composer","ingestedAt":"2026-08-27T18:06:13.201Z","slug":"CVE-2026-54718","body":"## Overview\n\nSilverstripe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-54718)\n\nAffected packages:\n\n- `symbiote/silverstripe-advancedworkflow < 6.4.5`\n- `symbiote/silverstripe-advancedworkflow >= 7.0.0, < 7.1.3`\n- `symbiote/silverstripe-advancedworkflow >= 7.2.0, < 7.2.1`\n\nPatched in:\n\n- `symbiote/silverstripe-advancedworkflow 6.4.5`\n- `symbiote/silverstripe-advancedworkflow 7.1.3`\n- `symbiote/silverstripe-advancedworkflow 7.2.1`\n\nSource: https://github.com/advisories/GHSA-39mm-rwm3-29jp","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}