CVE-2026-54390

{
  "id": "CVE-2026-54390",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-18T18:16:19.943",
  "lastModified": "2026-10-29T21:17:24.067",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized user-supplied input passed to the Smarty template engine. Attackers can exploit this flaw to read sensitive server-side values such as database credentials and encryption keys, and on versions 5.4.0 through 5.7.1, leverage registered Smarty modifiers including unserialize and file_get_contents to write a webshell to the web root and execute arbitrary commands as the web server user."
    },
    {
      "lang": "es",
      "value": "Las versiones de JTL Shop 5.2.0 a 5.7.1 contienen una vulnerabilidad de inyección de plantillas del lado del servidor que permite a atacantes no autenticados inyectar sintaxis de plantilla maliciosa debido a la entrada proporcionada por el usuario no saneada pasada al motor de plantillas Smarty. Los atacantes pueden explotar esta falla para leer valores sensibles del lado del servidor, como credenciales de la base de datos y claves de cifrado, y en las versiones 5.4.0 a 5.7.1, aprovechar modificadores Smarty registrados, incluyendo unserialize y file_get_contents, para escribir una webshell en la raíz web y ejecutar comandos arbitrarios como el usuario del servidor web."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "JTL Software",
          "product": "JTL Shop",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.0.0",
              "lessThanOrEqual": "5.1.8",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.2.0",
              "lessThan": "5.4.0",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.4.0",
              "lessThan": "5.5.4",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.6.0",
              "lessThan": "5.6.2",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.7.0",
              "lessThan": "5.7.2",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.5.4",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.6.2",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.7.2",
              "versionType": "semver",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-22T12:39:02.156506Z",
          "id": "CVE-2026-54390",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1336"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/",
      "source": "[email protected]"
    },
    {
      "url": "https://sansec.io/research/jtl-shop-ssti-rce",
      "source": "[email protected]"
    },
    {
      "url": "https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer",
      "source": "[email protected]"
    }
  ]
}