CVE-2026-54718Network attack vector

Authenticated code execution via email template interpolation

Published Aug 27, 2026 · Updated Aug 27, 2026

Server-side template injection in Silverstripe Advanced Workflow allows remote authenticated users to execute PHP on the server. The template parser emits attacker-controlled default or context text from a <%t %> block as a double-quoted PHP string, permitting variable-expression interpolation during rendering. Workflow-creation permission and control of NotifyUsersWorkflowAction.EmailTemplate are required; successful exploitation runs code with the web server's privileges.

CVSS severity7.2
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Silverstripe Advanced Workflow allows remote authenticated users to execute PHP on the server. The template parser emits attacker-controlled default or context text from a <%t %> block as a double-quoted PHP string, permitting variable-expression interpolation during rendering. Workflow-creation permission and control of NotifyUsersWorkflowAction.EmailTemplate are required; successful exploitation runs code with the web server's privileges.

The record

CVE
CVE-2026-54718
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Silverstripe
Product
Silverstripe Advanced Workflow
Classifications
T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.4.5
  2. Affected versionversion=>= 7.0.0, < 7.1.3
  3. Affected versionversion=>= 7.2.0, < 7.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Silverstripe · Silverstripe Advanced Workflowversion=< 6.4.5; version=>= 7.0.0, < 7.1.3; version=>= 7.2.0, < 7.2.1

Published CVSS scores

7.2GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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