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.
History

Mon, 31 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 28 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Silverstripe
Silverstripe silverstripe-advancedworkflow
Vendors & Products Silverstripe
Silverstripe silverstripe-advancedworkflow

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template
Weaknesses CWE-1336
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-08-27T17:19:51.691Z

Updated: 2026-08-31T18:17:17.110Z

Reserved: 2026-06-15T23:07:33.231Z

Link: CVE-2026-54718

cve-icon Vulnrichment

Updated: 2026-08-31T18:17:12.332Z

cve-icon NVD

Status : Received

Published: 2026-08-27T20:17:49.817

Modified: 2026-08-31T19:16:52.083

Link: CVE-2026-54718

cve-icon Redhat

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