CVE-2026-54718: high-severity vulnerability in silverstripe-advancedworkflow
Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.2epss 1.0%
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected products
silverstripe · silverstripe-advancedworkflowReferences
https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bbhttps://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678bhttps://github.com/silverstripe/silverstripe-advancedworkflow/pull/629https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jphttps://www.silverstripe.org/download/security-releases/cve-2026-54718