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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
silverstripe silverstripe-advancedworkflow
< 6.4.5affected>= 7.0.0, < 7.1.3affected>= 7.2.0, < 7.2.1affected
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 ↗