Vulnerability-Lookup

JVNDB-2026-000118

Vulnerability from jvndb - Published: 2026-08-19 05:06 - Updated:2026-08-19 05:06

Severity

8.8 (High) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

Multiple vulnerabilities in acmailer

Details

acmailer provided by Extra Innovation Inc. contains multiple vulnerabilities listed below:

Cross-site Scripting (CWE-79) - CVE-2026-66358
Incorrect Authorization (CWE-863) - CVE-2026-70408

CVE-2026-66358 Yuji Tounai of Mitsui Bussan Secure Directions, Inc. and Fumiya Funakoshi reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership. CVE-2026-70408 Fumiya Funakoshi reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN47716829/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-66358
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-70408
	Permissions(CWE-264)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html
	Cross-site Scripting(CWE-79)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

Extra Innovation Inc.

acmailer

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000118.html",
  "dc:date": "2026-08-19T14:06+09:00",
  "dcterms:issued": "2026-08-19T14:06+09:00",
  "dcterms:modified": "2026-08-19T14:06+09:00",
  "description": "acmailer provided by Extra Innovation Inc. contains multiple vulnerabilities listed below:\u003ca href=\u0027https://cwe.mitre.org/data/definitions/79.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003ca href=\u0027https://cwe.mitre.org/data/definitions/863.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eCross-site Scripting (CWE-79) - CVE-2026-66358\u003c/li\u003e\u003cli\u003eIncorrect Authorization (CWE-863) - CVE-2026-70408\u003c/li\u003e\u003c/ul\u003eCVE-2026-66358\r\nYuji Tounai of Mitsui Bussan Secure Directions, Inc. and Fumiya Funakoshi reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.\r\n\r\nCVE-2026-70408\r\nFumiya Funakoshi reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000118.html",
  "sec:cpe": {
    "#text": "cpe:/a:misc:extrainnovation_acmailer",
    "@product": "acmailer",
    "@vendor": "Extra Innovation Inc.",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "8.8",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000118",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN47716829/index.html",
      "@id": "JVN#47716829",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-66358",
      "@id": "CVE-2026-66358",
      "@source": "CVE"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-70408",
      "@id": "CVE-2026-70408",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-264",
      "@title": "Permissions(CWE-264)"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-79",
      "@title": "Cross-site Scripting(CWE-79)"
    }
  ],
  "title": "Multiple vulnerabilities in acmailer"
}

CVE-2026-66358 (GCVE-0-2026-66358)

Vulnerability from cvelistv5 – Published: 2026-08-19 04:53 – Updated: 2026-08-19 04:53

Summary

A cross-site scripting vulnerability exists in acmailer, which may allow an attacker to execute an arbitrary script.

Severity

6.1 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CWE

CWE-79 - Cross-site scripting (XSS)

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.acmailer.jp/info/de.cgi?id=119
https://jvn.jp/en/jp/JVN47716829/

Impacted products

2 products

Vendor	Product	Version
Extra Innovation Inc.	acmailer CGI	Affected: 0 , < 4.1.2 (semver)
Extra Innovation Inc.	acmailer DB	Affected: 0 , < 1.2.2 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "acmailer CGI",
          "vendor": "Extra Innovation Inc.",
          "versions": [
            {
              "lessThan": "4.1.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "acmailer DB",
          "vendor": "Extra Innovation Inc.",
          "versions": [
            {
              "lessThan": "1.2.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A cross-site scripting vulnerability exists in acmailer, which may allow an attacker to execute an arbitrary script."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "Cross-site scripting (XSS)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T04:53:33.355Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.acmailer.jp/info/de.cgi?id=119"
        },
        {
          "url": "https://jvn.jp/en/jp/JVN47716829/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-66358",
    "datePublished": "2026-08-19T04:53:33.355Z",
    "dateReserved": "2026-08-10T06:57:22.734Z",
    "dateUpdated": "2026-08-19T04:53:33.355Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-70408 (GCVE-0-2026-70408)

Vulnerability from cvelistv5 – Published: 2026-08-19 04:54 – Updated: 2026-08-19 15:46

Summary

An incorrect authorization vulnerability exists in acmailer, which may allow a user to create a sub-account that has administrative privileges.

Severity

8.8 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 15:45 UTC

CWE

CWE-863 - Incorrect authorization

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.acmailer.jp/info/de.cgi?id=119
https://jvn.jp/en/jp/JVN47716829/

Impacted products

2 products

Vendor	Product	Version
Extra Innovation Inc.	acmailer CGI	Affected: 0 , < 4.1.2 (semver)
Extra Innovation Inc.	acmailer DB	Affected: 0 , < 1.2.2 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-70408",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-19T15:45:48.860949Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-19T15:46:04.620Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "acmailer CGI",
          "vendor": "Extra Innovation Inc.",
          "versions": [
            {
              "lessThan": "4.1.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "acmailer DB",
          "vendor": "Extra Innovation Inc.",
          "versions": [
            {
              "lessThan": "1.2.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An incorrect authorization vulnerability exists in acmailer, which may allow a user to create a sub-account that has administrative privileges."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "Incorrect authorization",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T04:54:02.396Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://www.acmailer.jp/info/de.cgi?id=119"
        },
        {
          "url": "https://jvn.jp/en/jp/JVN47716829/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-70408",
    "datePublished": "2026-08-19T04:54:02.396Z",
    "dateReserved": "2026-08-10T06:57:23.652Z",
    "dateUpdated": "2026-08-19T15:46:04.620Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

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.

Action not permitted

JVNDB-2026-000118

CVE-2026-66358 (GCVE-0-2026-66358)

CVE-2026-70408 (GCVE-0-2026-70408)

Tags

Sightings

Nomenclature