CVE-2026-54718 (GCVE-0-2026-54718)
Vulnerability from cvelistv5
Published
2026-08-27 17:19
Modified
2026-08-31 18:17
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| silverstripe | silverstripe-advancedworkflow |
Version: < 6.4.5 Version: >= 7.0.0, < 7.1.3 Version: >= 7.2.0, < 7.2.1 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-54718",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-31T18:17:05.218921Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T18:17:17.110Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "silverstripe-advancedworkflow",
"vendor": "silverstripe",
"versions": [
{
"status": "affected",
"version": "\u003c 6.4.5"
},
{
"status": "affected",
"version": "\u003e= 7.0.0, \u003c 7.1.3"
},
{
"status": "affected",
"version": "\u003e= 7.2.0, \u003c 7.2.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1336",
"description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T17:19:51.691Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3"
},
{
"name": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1"
},
{
"name": "https://www.silverstripe.org/download/security-releases/cve-2026-54718",
"tags": [
"x_refsource_MISC"
],
"url": "https://www.silverstripe.org/download/security-releases/cve-2026-54718"
}
],
"source": {
"advisory": "GHSA-39mm-rwm3-29jp",
"discovery": "UNKNOWN"
},
"title": "Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54718",
"datePublished": "2026-08-27T17:19:51.691Z",
"dateReserved": "2026-06-15T23:07:33.231Z",
"dateUpdated": "2026-08-31T18:17:17.110Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-54718\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-31T18:17:05.218921Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-31T18:17:12.332Z\"}}], \"cna\": {\"title\": \"Silverstripe Advanced Workflow: Remote code execution via advanced workflow email template\", \"source\": {\"advisory\": \"GHSA-39mm-rwm3-29jp\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"silverstripe\", \"product\": \"silverstripe-advancedworkflow\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 6.4.5\"}, {\"status\": \"affected\", \"version\": \"\u003e= 7.0.0, \u003c 7.1.3\"}, {\"status\": \"affected\", \"version\": \"\u003e= 7.2.0, \u003c 7.2.1\"}]}], \"references\": [{\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1\", \"name\": \"https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://www.silverstripe.org/download/security-releases/cve-2026-54718\", \"name\": \"https://www.silverstripe.org/download/security-releases/cve-2026-54718\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1336\", \"description\": \"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-08-27T17:19:51.691Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-54718\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-31T18:17:17.110Z\", \"dateReserved\": \"2026-06-15T23:07:33.231Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-08-27T17:19:51.691Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…