FKIE_CVE-2026-54718

Vulnerability from fkie_nvd - Published: 2026-08-27 20:17 - Updated: 2026-08-27 20:17
Severity
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/pull/629
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/pull/630
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1
security-advisories@github.comhttps://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp
security-advisories@github.comhttps://www.silverstripe.org/download/security-releases/cve-2026-54718
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-54718",
  "lastModified": "2026-08-27T20:17:49.817",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-27T20:17:49.817",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://www.silverstripe.org/download/security-releases/cve-2026-54718"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1336"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.