Vulnerability-Lookup

CVE-2026-54390 (GCVE-0-2026-54390)

Vulnerability from cvelistv5 – Published: 2026-06-18 17:33 – Updated: 2026-06-23 11:39 X_Open Source

Title

JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer

Summary

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.

Severity

9.3 (Critical)


                        
                          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

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-22 12:39 UTC

CWE

CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://sansec.io/research/jtl-shop-ssti-rce	technical-description
https://forum.jtl-software.de/threads/jtl-shop-5-…	release-notespatch
https://www.vulncheck.com/advisories/jtl-shop-ser…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
JTL Software	JTL Shop	Unaffected: 5.0.0 , ≤ 5.1.8 (semver) Affected: 5.2.0 , < 5.4.0 (semver) Affected: 5.4.0 , ≤ 5.7.1 (semver) Unaffected: 5.5.4 (semver) Unaffected: 5.6.2 (semver) Unaffected: 5.7.2 (semver)	guessed

Date Public

2026-04-08 00:00

Credits

Sansec

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54390

Vulnerability from fkie_nvd - Published: 2026-06-18 18:16 - Updated: 2026-06-23 13:16

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/
	disclosure@vulncheck.com	https://sansec.io/research/jtl-shop-ssti-rce
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54390",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-22T12:39:02.156506Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-18T18:16:19.943",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://sansec.io/research/jtl-shop-ssti-rce"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1336"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-PXQ6-FR5M-FWH5

Vulnerability from github – Published: 2026-06-18 18:35 – Updated: 2026-06-18 18:35

Details

Severity

9.8 (Critical)


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

9.3 (Critical)


                  
                    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

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-54390"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1336"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-18T18:16:19Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-pxq6-fr5m-fwh5",
  "modified": "2026-06-18T18:35:25Z",
  "published": "2026-06-18T18:35:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54390"
    },
    {
      "type": "WEB",
      "url": "https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278"
    },
    {
      "type": "WEB",
      "url": "https://sansec.io/research/jtl-shop-ssti-rce"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-54390 (GCVE-0-2026-54390)

FKIE_CVE-2026-54390

GHSA-PXQ6-FR5M-FWH5

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