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CVE-2026-54718— Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template

Quick assessment

Affected
silverstripe silverstripe-advancedworkflow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Silverstripe Advanced Workflow 是一个高度可配置的基于步骤的工作流模块。在 6.4.5、7.1.3 和 7.2.1 版本之前，拥有编辑高级工作流邮件模板权限的攻击者可以在 NotifyUsersWorkflowAction.EmailTemplate 中植入一个精心构造的服务端模板载荷。当 NotifyUsersWorkflowAction 通过 Silverstripe 模板引擎 SSTemplateParser 渲染该字段时，该载荷可触发 PHP 表达式求值并在服务器上执行任意代码

CVSS 7.2 · High
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I. Basic Information for CVE-2026-54718

Vulnerability Information
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Vulnerability Title
Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
silverstripe silverstripe-advancedworkflow < 6.4.5 -

II. Public POCs for CVE-2026-54718

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III. Intelligence Information for CVE-2026-54718

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Patches & Fixes for CVE-2026-54718 (4)

Vendor Advisories for CVE-2026-54718 (1)

Vendor Pages for CVE-2026-54718 (4)

IV. Related Vulnerabilities

Same vendor: silverstripe
Same weakness: CWE-1336

V. Comments for CVE-2026-54718

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