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  "publisher": "脆弱性ナビ",
  "origin": "https://zeijaku.ittrip.xyz",
  "terms": [
    {
      "name": "CVE Program",
      "url": "https://www.cve.org/legal/termsofuse",
      "notice": "CVE content is used subject to the CVE Program Terms of Use. CVE is a trademark of The MITRE Corporation.",
      "licenseText": "CVE content: Copyright The MITRE Corporation. CVE is a trademark of The MITRE Corporation.\nCVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.\nDisclaimers: ALL DOCUMENTS AND THE INFORMATION CONTAINED THEREIN PROVIDED BY MITRE ARE PROVIDED ON AN \"AS IS\" BASIS AND THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE MITRE CORPORATION, ITS BOARD OF TRUSTEES, OFFICERS, AGENTS, AND EMPLOYEES, DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."
    },
    {
      "name": "NIST NVD",
      "url": "https://nvd.nist.gov/general/faq",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "name": "JVN",
      "url": "https://jvn.jp/contact/index.html",
      "notice": "出典：JVN（JPCERT/CC・IPA）。原文は各レコードの参照先を確認してください。"
    },
    {
      "name": "CISA KEV",
      "url": "https://github.com/cisagov/kev-data",
      "notice": "Known Exploited Vulnerabilities catalog, CISA. CC0."
    }
  ],
  "record": {
    "id": "CVE-2026-28173",
    "aliases": [],
    "title": "WP Event SOlution：脆弱性情報",
    "summary": "WP Event Solution プラグインのバージョン 4.1.19 以下を使用している顧客は、任意のコンテンツを削除される可能性があります。",
    "risk": "攻撃者が任意のコンテンツを削除できる。",
    "product": "WP Event SOlution",
    "category": "wordpress",
    "component": "plugin",
    "severity": "high",
    "cvss": 7.1,
    "cvssVersion": "3.1",
    "cvssSource": "Patchstack",
    "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
    "affected": [
      {
        "product": "WP Event SOlution",
        "range": ">= n/a / <= 4.1.19 / 範囲内で状態が変わります（開始時: 影響あり。変更点: 4.1.20から影響なし。版の順序・条件は原文確認）"
      }
    ],
    "fixed": [],
    "steps": [
      "WordPress Eventin プラグインを最新バージョン（少なくとも 4.1.20）に更新する。",
      "「CVE-2026-28173」と現在の版を管理担当者・提供元へ伝え、この問題に対応した修正版が提供されているか確認します。下の問い合わせ文に記入すれば、そのまま依頼できます。対象範囲の上限から修正版の番号を推測しないでください。",
      "ファイルとデータベースのバックアップを取り、管理画面の「ダッシュボード」→「更新」で該当プラグインの更新を実行します。更新が表示されない有料製品などは、購入先・開発元の正規の配布経路を利用してください。"
    ],
    "references": [
      {
        "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
        "label": "CVE：Patchstack"
      },
      {
        "url": "https://www.cve.org/CVERecord?id=CVE-2026-28173",
        "label": "CVE公式レコード"
      },
      {
        "url": "https://patchstack.com/database/wordpress/plugin/wp-event-solution/vulnerability/wordpress-wp-event-solution-plugin-4-1-19-arbitrary-content-deletion-vulnerability?_s_id=cve",
        "label": "audit@patchstack.com"
      },
      {
        "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28173",
        "label": "NVDの原文"
      },
      {
        "url": "https://www.first.org/cvss/v3.1/specification-document",
        "label": "FIRST公式：CVSS 3.1の条件の定義"
      },
      {
        "url": "https://wordpress.org/documentation/article/plugins-screen/",
        "label": "WordPress公式：プラグイン一覧"
      },
      {
        "url": "https://wordpress.org/documentation/article/site-health-screen/",
        "label": "WordPress公式：サイトヘルスの情報"
      },
      {
        "url": "https://wordpress.org/documentation/article/updating-wordpress/",
        "label": "WordPress公式：本体の更新"
      },
      {
        "url": "https://wordpress.org/documentation/article/dashboard-updates-screen/",
        "label": "WordPress公式：更新画面"
      },
      {
        "url": "https://wordpress.org/documentation/article/manage-plugins/",
        "label": "WordPress公式：プラグインの確認と更新"
      }
    ],
    "publishedAt": "2026-08-13T13:36:33.153Z",
    "modifiedAt": "2026-10-23T18:10:00.167Z",
    "fetchedAt": "2026-10-23T18:21:09.767Z",
    "exploitStatus": "unknown",
    "sources": [
      "CVE",
      "NVD"
    ],
    "originalText": "Customer Arbitrary Content Deletion in WP Event SOlution <= 4.1.19 versions.",
    "sourceTitle": "WordPress WP Event SOlution plugin <= 4.1.19 - Arbitrary Content Deletion vulnerability",
    "summaryMethod": "公式の公開情報を根拠に自動作成した日本語解説です。引用との整合性を自動検査しています。人による個別確認や利用環境の診断ではありません。",
    "state": "published",
    "affectedDetails": [
      {
        "vendor": "Arraytics",
        "collectionURL": "https://wordpress.org/plugins",
        "defaultStatus": "unaffected",
        "packageName": "wp-event-solution",
        "product": "WP Event SOlution",
        "versions": [
          {
            "lessThanOrEqual": "4.1.19",
            "status": "affected",
            "version": "n/a",
            "versionType": "custom",
            "changes": [
              {
                "at": "4.1.20",
                "status": "unaffected"
              }
            ]
          }
        ]
      }
    ],
    "officialEvidence": {
      "schemaVersion": "1.0",
      "id": "CVE-2026-28173",
      "sourceType": "CVE",
      "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
      "fetchedAt": "2026-10-23T18:21:09.767Z",
      "publishedAt": "2026-08-13T13:36:33.153Z",
      "modifiedAt": "2026-08-13T15:48:23.293Z",
      "state": "published",
      "provider": "Patchstack",
      "title": "WordPress WP Event SOlution plugin <= 4.1.19 - Arbitrary Content Deletion vulnerability",
      "descriptions": [
        {
          "lang": "en",
          "value": "Customer Arbitrary Content Deletion in WP Event SOlution <= 4.1.19 versions.",
          "sourcePath": "/containers/cna/descriptions/0/value"
        }
      ],
      "affected": [
        {
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          "product": "WP Event SOlution",
          "sourcePath": "/containers/cna/affected/0",
          "packageName": "wp-event-solution",
          "collectionURL": "https://wordpress.org/plugins",
          "defaultStatus": "unaffected",
          "platforms": [],
          "modules": [],
          "programFiles": [],
          "cpes": [],
          "programRoutines": [],
          "versions": [
            {
              "sourcePath": "/containers/cna/affected/0/versions/0",
              "version": "n/a",
              "lessThanOrEqual": "4.1.19",
              "versionType": "custom",
              "status": "affected",
              "changes": [
                {
                  "at": "4.1.20",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update the WordPress Eventin plugin to the latest available version (at least 4.1.20).",
          "sourcePath": "/containers/cna/solutions/0/value"
        }
      ],
      "workarounds": [],
      "exploits": [],
      "rejectedReasons": [],
      "problemTypes": [
        {
          "cweId": "CWE-862",
          "lang": "en",
          "description": "CWE-862 Missing Authorization",
          "sourcePath": "/containers/cna/problemTypes/0/descriptions/0"
        }
      ],
      "metrics": [
        {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "provider": "Patchstack",
          "sourcePath": "/containers/cna/metrics/0/cvssV3_1"
        }
      ],
      "references": [
        {
          "url": "https://patchstack.com/database/wordpress/plugin/wp-event-solution/vulnerability/wordpress-wp-event-solution-plugin-4-1-19-arbitrary-content-deletion-vulnerability?_s_id=cve",
          "label": "Patchstack",
          "tags": [
            "vdb-entry"
          ],
          "provider": "Patchstack",
          "sourcePath": "/containers/cna/references/0"
        }
      ],
      "snippets": [
        {
          "evidenceId": "official:/containers/cna/affected/0",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourcePath": "/containers/cna/affected/0",
          "text": "{\"vendor\":\"Arraytics\",\"collectionURL\":\"https://wordpress.org/plugins\",\"defaultStatus\":\"unaffected\",\"packageName\":\"wp-event-solution\",\"product\":\"WP Event SOlution\",\"versions\":[{\"lessThanOrEqual\":\"4.1.19\",\"status\":\"affected\",\"version\":\"n/a\",\"versionType\":\"custom\",\"changes\":[{\"at\":\"4.1.20\",\"status\":\"unaffected\"}]}]}",
          "truncated": false,
          "representation": "source_json"
        },
        {
          "evidenceId": "official:/containers/cna/descriptions/0/value",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourcePath": "/containers/cna/descriptions/0/value",
          "text": "Customer Arbitrary Content Deletion in WP Event SOlution <= 4.1.19 versions.",
          "truncated": false,
          "representation": "source_excerpt"
        },
        {
          "evidenceId": "official:/containers/cna/solutions/0/value",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourcePath": "/containers/cna/solutions/0/value",
          "text": "Update the WordPress Eventin plugin to the latest available version (at least 4.1.20).",
          "truncated": false,
          "representation": "source_excerpt"
        },
        {
          "evidenceId": "official:/containers/cna/problemTypes/0/descriptions/0",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourcePath": "/containers/cna/problemTypes/0/descriptions/0",
          "text": "{\"lang\":\"en\",\"cweId\":\"CWE-862\",\"description\":\"CWE-862 Missing Authorization\",\"type\":\"CWE\"}",
          "truncated": false,
          "representation": "source_json"
        },
        {
          "evidenceId": "official:/containers/cna/metrics/0/cvssV3_1",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourcePath": "/containers/cna/metrics/0/cvssV3_1",
          "text": "{\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\",\"version\":\"3.1\",\"baseSeverity\":\"HIGH\",\"baseScore\":7.1,\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H\"}",
          "truncated": false,
          "representation": "source_json"
        }
      ],
      "limits": {
        "completeness": "official_record",
        "truncatedFields": [],
        "note": "CVE公式レコードに記載された情報です。参照先の個別ページ本文は含みません。unaffected（影響なし）の版を修正版とは推測しません。"
      }
    },
    "sourceSnapshots": [
      {
        "source": "CVE",
        "modifiedAt": "2026-08-13T15:48:23.293Z",
        "fetchedAt": "2026-10-23T18:21:09.767Z",
        "state": "published"
      },
      {
        "source": "NVD",
        "modifiedAt": "2026-10-23T18:10:00.167Z",
        "fetchedAt": "2026-10-23T18:17:49.704Z",
        "state": "published"
      }
    ],
    "sourceSummary": "WP Event SOlutionに脆弱性情報に関する脆弱性情報があります。影響を受ける条件を確認してください。",
    "sourceRisk": "影響と攻撃の成立条件は、リンク先の公式情報で確認してください。",
    "guidance": {
      "schemaVersion": "1.0",
      "method": "automatic",
      "reviewedAt": null,
      "reviewState": "current",
      "generatedAt": "2026-10-23T18:21:09.767Z",
      "generatorVersion": "2026-10-23.3",
      "sourceFingerprint": "47a01e70e5253b9f36f9faef2ee61027029d3d5363f28d21c3f7be05fe2b9fc7",
      "sourceModifiedAt": "2026-10-23T18:10:00.167Z",
      "model": "@cf/openai/gpt-oss-120b",
      "verificationMethod": "exact_source_excerpt_and_independent_semantic_check",
      "summary": "WP Event Solution プラグインのバージョン 4.1.19 以下を使用している顧客は、任意のコンテンツを削除される可能性があります。",
      "risk": "攻撃者が任意のコンテンツを削除できる。",
      "summaryEvidenceIds": [
        "E1",
        "E2"
      ],
      "riskEvidenceIds": [
        "E1"
      ],
      "applicability": [
        {
          "text": "公式の対象表：Arraytics / WP Event SOlution。影響ありとして記載：4.1.19以下（原資料では開始版が未指定）。途中の変更：4.1.20から影響なし。",
          "kind": "fact",
          "sourceUrls": [
            "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json"
          ],
          "evidenceIds": [
            "E3"
          ]
        }
      ],
      "versionChecks": [
        {
          "text": "管理担当者に、利用中の製品名・開発元・版やビルド番号を確認してもらいます。上に記載した対象の機能・設定・利用者の権限も、実際の環境と照合してください。",
          "kind": "procedure",
          "sourceUrls": [
            "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json"
          ],
          "evidenceIds": [
            "E3"
          ]
        },
        {
          "text": "WordPressの管理画面にログインし、「プラグイン」→「インストール済みプラグイン」を開きます。「WP Event SOlution」と同じ製品名・開発元の項目を探し、表示されているバージョンを控えてください。停止中のプラグインも一覧に含めて確認します。",
          "kind": "procedure",
          "sourceUrls": [
            "https://wordpress.org/documentation/article/plugins-screen/"
          ]
        },
        {
          "text": "管理画面に入れない、または同じ名前の製品を判別できない場合は、下の問い合わせ文をサイトの制作会社・管理担当者に送ってください。名前が見つからないという理由だけで、安全とは判定しないでください。",
          "kind": "procedure",
          "sourceUrls": [
            "https://wordpress.org/documentation/article/site-health-screen/",
            "https://wordpress.org/documentation/article/plugins-screen/"
          ]
        }
      ],
      "actions": [
        {
          "text": "WordPress Eventin プラグインを最新バージョン（少なくとも 4.1.20）に更新する。",
          "kind": "fix",
          "sourceUrls": [
            "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json"
          ],
          "evidenceIds": [
            "E4"
          ]
        },
        {
          "text": "「CVE-2026-28173」と現在の版を管理担当者・提供元へ伝え、この問題に対応した修正版が提供されているか確認します。下の問い合わせ文に記入すれば、そのまま依頼できます。対象範囲の上限から修正版の番号を推測しないでください。",
          "kind": "procedure",
          "sourceUrls": [
            "https://www.cve.org/CVERecord?id=CVE-2026-28173",
            "https://patchstack.com/database/wordpress/plugin/wp-event-solution/vulnerability/wordpress-wp-event-solution-plugin-4-1-19-arbitrary-content-deletion-vulnerability?_s_id=cve",
            "https://nvd.nist.gov/vuln/detail/CVE-2026-28173"
          ]
        },
        {
          "text": "ファイルとデータベースのバックアップを取り、管理画面の「ダッシュボード」→「更新」で該当プラグインの更新を実行します。更新が表示されない有料製品などは、購入先・開発元の正規の配布経路を利用してください。",
          "kind": "procedure",
          "sourceUrls": [
            "https://wordpress.org/documentation/article/updating-wordpress/",
            "https://wordpress.org/documentation/article/dashboard-updates-screen/",
            "https://wordpress.org/documentation/article/manage-plugins/"
          ]
        }
      ],
      "temporaryMitigations": [
        {
          "text": "更新できない場合は、対象機能の停止や公開範囲の制限が使えるかを管理担当者と検討し、実施内容と更新予定日を記録してください。プラグインの「無効化」だけでこの脆弱性を防げるかは個別に確認が必要です。",
          "kind": "procedure",
          "sourceUrls": [
            "https://wordpress.org/documentation/article/plugins-screen/",
            "https://www.cve.org/CVERecord?id=CVE-2026-28173",
            "https://patchstack.com/database/wordpress/plugin/wp-event-solution/vulnerability/wordpress-wp-event-solution-plugin-4-1-19-arbitrary-content-deletion-vulnerability?_s_id=cve",
            "https://nvd.nist.gov/vuln/detail/CVE-2026-28173"
          ]
        }
      ],
      "verification": [
        {
          "text": "対応を依頼した場合は、実施した版・設定と完了日時、この脆弱性への修正が含まれると判断した根拠を担当者から受け取ってください。更新後は普段使う主要な操作も確認します。",
          "kind": "procedure",
          "sourceUrls": [
            "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json"
          ],
          "evidenceIds": [
            "E3"
          ]
        },
        {
          "text": "更新後に同じ管理画面を開き直してバージョンを記録します。修正対象の系列・版と一致するかを照合し、サイト表示、ログイン、フォームや購入など普段使う主要な操作も確認してください。更新ボタンを押しただけでは完了としないでください。",
          "kind": "procedure",
          "sourceUrls": [
            "https://wordpress.org/documentation/article/updating-wordpress/",
            "https://wordpress.org/documentation/article/dashboard-updates-screen/"
          ]
        }
      ],
      "unknowns": [
        "この解説は、利用中の機器・サイトの設定や修正の適用状況を検査した結果ではありません。製品名・版と上に示した条件を、実際の環境と照合してください。"
      ],
      "sources": [
        {
          "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "label": "CVE：Patchstack"
        },
        {
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-28173",
          "label": "CVE公式レコード"
        },
        {
          "url": "https://patchstack.com/database/wordpress/plugin/wp-event-solution/vulnerability/wordpress-wp-event-solution-plugin-4-1-19-arbitrary-content-deletion-vulnerability?_s_id=cve",
          "label": "audit@patchstack.com"
        },
        {
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28173",
          "label": "NVDの原文"
        },
        {
          "url": "https://www.first.org/cvss/v3.1/specification-document",
          "label": "FIRST公式：CVSS 3.1の条件の定義"
        },
        {
          "url": "https://wordpress.org/documentation/article/plugins-screen/",
          "label": "WordPress公式：プラグイン一覧"
        },
        {
          "url": "https://wordpress.org/documentation/article/site-health-screen/",
          "label": "WordPress公式：サイトヘルスの情報"
        },
        {
          "url": "https://wordpress.org/documentation/article/updating-wordpress/",
          "label": "WordPress公式：本体の更新"
        },
        {
          "url": "https://wordpress.org/documentation/article/dashboard-updates-screen/",
          "label": "WordPress公式：更新画面"
        },
        {
          "url": "https://wordpress.org/documentation/article/manage-plugins/",
          "label": "WordPress公式：プラグインの確認と更新"
        }
      ],
      "evidence": [
        {
          "id": "E1",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourceField": "/containers/cna/descriptions/0/value",
          "excerpt": "Customer Arbitrary Content Deletion in WP Event SOlution <= 4.1.19 versions.",
          "language": "en",
          "representation": "source_excerpt"
        },
        {
          "id": "E2",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourceField": "/containers/cna/title",
          "excerpt": "WordPress WP Event SOlution plugin <= 4.1.19 - Arbitrary Content Deletion vulnerability",
          "language": null
        },
        {
          "id": "E3",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourceField": "/containers/cna/affected/0",
          "excerpt": "{\"vendor\":\"Arraytics\",\"collectionURL\":\"https://wordpress.org/plugins\",\"defaultStatus\":\"unaffected\",\"packageName\":\"wp-event-solution\",\"product\":\"WP Event SOlution\",\"versions\":[{\"lessThanOrEqual\":\"4.1.19\",\"status\":\"affected\",\"version\":\"n/a\",\"versionType\":\"custom\",\"changes\":[{\"at\":\"4.1.20\",\"status\":\"unaffected\"}]}]}",
          "language": null,
          "representation": "source_json"
        },
        {
          "id": "E4",
          "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/28xxx/CVE-2026-28173.json",
          "sourceField": "/containers/cna/solutions/0/value",
          "excerpt": "Update the WordPress Eventin plugin to the latest available version (at least 4.1.20).",
          "language": "en",
          "representation": "source_excerpt"
        }
      ],
      "supportRequest": "件名：CVE-2026-28173（WP Event SOlution）の影響と対応確認\n\n利用中の製品・サービス：[記入してください]\n現在のバージョン・設定：[不明なら「不明」と記入]\n\n次の公式情報にある条件が、私たちの環境に当てはまるか確認をお願いします。\n・公式の対象表：Arraytics / WP Event SOlution。影響ありとして記載：4.1.19以下（原資料では開始版が未指定）。途中の変更：4.1.20から影響なし。\n\n対象の場合、適用する修正・回避策、実施予定、停止や再起動の必要性、完了後の確認結果を教えてください。\n確認している情報：https://zeijaku.ittrip.xyz/vulnerabilities/CVE-2026-28173",
      "publicationCheckVersion": "2026-10-23.1",
      "sourceNotices": [],
      "automation": {
        "status": "ready",
        "lastAttempt": "2026-10-23T18:21:09.767Z",
        "lastSuccess": "2026-10-23T18:21:09.767Z",
        "sourceCheckedAt": "2026-10-23T18:21:09.767Z",
        "errorCode": null
      },
      "glossary": []
    }
  }
}