{"id":"CVE-2026-54718","aliases":["EUVD-2026-67160","GHSA-39mm-rwm3-29jp"],"status":"published","title":"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template","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.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01047,"percentile":0.64679,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1336","CWE-20"],"published":"2026-08-27T17:19:51Z","modified":"2026-10-28T02:30:33Z","fixes":[{"ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","fixed_in":["6.4.5","7.1.3","7.2.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.5"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.1.3"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.5"}]}],"versions":["2.1.0","3.0.1","3.0.1-rc1","3.0.2","3.0.3","3.0.4","3.0.5","3.0.6","3.1.0","3.1.1","3.1.2","3.1.3","3.2.0","3.2.1","3.2.2","3.2.3","3.3.0","3.3.1","3.3.2","3.3.3","3.4.0","3.5.0","3.6.0","3.6.1","3.7.0","3.7.1","3.7.2","3.8.0","3.8.1","3.8.2","3.9.0","3.9.1","4.0.0","4.0.1","4.1.0","4.2.0","5.0.0","5.0.1","5.0.2","5.0.3","5.0.4","5.0.5","5.0.6","5.0.7","5.0.8","5.1.0","5.1.1","5.1.2","5.2.0","5.2.1","5.2.2","5.3.0","5.3.1","5.4.0","5.4.0-beta1","5.4.0-rc1","5.5.0","5.5.0-alpha1","5.5.0-beta1","5.5.0-rc1","5.5.1","5.6.0","5.6.0-beta1","5.6.0-rc1","5.7.0","5.8.0","5.8.0-beta1","5.8.0-rc1","5.9.0","5.9.0-beta1","5.9.0-rc1","5.9.1","5.9.2","5.9.3","5.9.4","5.9.5","5.9.6","5.9.7","6.0.0","6.0.0-beta1","6.0.0-rc1","6.0.1","6.0.2","6.0.3","6.0.4","6.1.0","6.1.0-beta1","6.1.0-rc1","6.1.1","6.1.2","6.1.3","6.1.4","6.2.0","6.2.0-beta1","6.2.0-rc1","6.2.1","6.2.2","6.2.3","6.2.4","6.3.0","6.3.0-beta1","6.3.0-rc1","6.3.1","6.4.0","6.4.0-beta1","6.4.0-rc1","6.4.1","6.4.2","6.4.3","6.4.4"]},{"source":"osv","ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.1.3"}]}],"versions":["7.0.0","7.0.1","7.0.2","7.1.0","7.1.0-beta1","7.1.0-rc1","7.1.1","7.1.2"]},{"source":"osv","ecosystem":"Packagist","package":"symbiote/silverstripe-advancedworkflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.1"}]}],"versions":["7.2.0"]}],"products":[{"vendor":"silverstripe","product":"silverstripe-advancedworkflow"}],"references":[{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1","tags":["x_refsource_MISC","web"]},{"url":"https://www.silverstripe.org/download/security-releases/cve-2026-54718","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symbiote/silverstripe-advancedworkflow/CVE-2026-54718.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-39mm-rwm3-29jp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54718.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54718","tags":["advisory"]},{"url":"https://github.com/silverstripe/silverstripe-advancedworkflow","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-54718","title":"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template","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.","status":"published","published":"2026-08-27T17:19:51.691Z","modified":"2026-08-31T18:17:17.11Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-67160","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.","status":"published","published":"2026-08-27T17:19:51Z","modified":"2026-08-31T18:17:17Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:20.215322Z"}],"ghsa":[{"id":"GHSA-39mm-rwm3-29jp","title":"silverstripe-advancedworkflow vulnerable to remote code execution via advanced workflow email template","description":"### Impact\nThe advanced workflow email template field is vulnerable to a specially crafted payload that can be used to run arbitrary code on the server.\n\n### Reported by\nSteve Boyd\nSilverstripe Ltd.","status":"published","published":"2026-08-27T17:20:40Z","modified":"2026-08-27T17:20:42Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-20","CWE-1336"],"updated_at":"2026-11-02T14:41:07.031507Z"}],"nvd":[{"id":"CVE-2026-54718","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.","status":"published","published":"2026-08-27T20:17:49.817Z","modified":"2026-09-09T21:09:13.08Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T14:12:42.035353Z"}],"osv":[{"id":"CVE-2026-54718","title":"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template","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.","status":"published","published":"2026-08-27T17:19:51.691Z","modified":"2026-10-28T02:30:33.57983459Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T15:45:10.818486Z"},{"id":"GHSA-39mm-rwm3-29jp","title":"silverstripe-advancedworkflow vulnerable to remote code execution via advanced workflow email template","description":"### Impact\nThe advanced workflow email template field is vulnerable to a specially crafted payload that can be used to run arbitrary code on the server.\n\n### Reported by\nSteve Boyd\nSilverstripe Ltd.","status":"published","published":"2026-08-27T17:20:40Z","modified":"2026-09-11T05:15:04.550979119Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1336","CWE-20"],"updated_at":"2026-11-02T15:46:35.406455Z"}]}}