{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50281",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-02T19:33:59.852902Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-02T19:44:23.581Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "cms",
          "vendor": "craftcms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.7.0, \u003c 5.9.21"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Craft CMS is a content management system (CMS). Versions 5.7.0 and above, prior to 5.9.21 contain a mass-assignment flaw in the bulk-duplicate element action. An attacker who is only able to duplicate their own entires can submit an arbitrary id through the newAttributes request parameter. The duplication routine overrides its own id = null reset with that value and writes the attacker\u0027s attributes into the victim\u0027s existing entry row. ElementsController::beforeAction() pulls the request body into $this-\u003e_attributes and rejects requests that ship an id or canonicalId key at the top level, actionBulkDuplicate(), reads a separate newAttributes array and passes it straight through to the service layer. Elements::duplicateElement() clones the source element, sets id to null, and then hands the attacker\u0027s array to Craft::configure(), which  overwrites the reset id with any numeric value inside $newAttributes. PHP Yii\u0027s saveElement() then performs an UPDATE against the row with that primary key instead of an INSERT. The attackers\u0027s title, slug, authorId, postDate, and UID land on the victim\u0027s entry. safeAttributes() on Entry includes id because the base element model exposes it, so the Collection::only() filter does not strip it. This issue has been fixed in version 5.9.21."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-915",
              "description": "CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-02T16:02:14.029Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/craftcms/cms/security/advisories/GHSA-x5m4-g2cq-52pq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/craftcms/cms/security/advisories/GHSA-x5m4-g2cq-52pq"
        },
        {
          "name": "https://github.com/craftcms/cms/commit/8f6587c25050bbb6e080d59c71f6bb8932fc8600",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/craftcms/cms/commit/8f6587c25050bbb6e080d59c71f6bb8932fc8600"
        }
      ],
      "source": {
        "advisory": "GHSA-x5m4-g2cq-52pq",
        "discovery": "UNKNOWN"
      },
      "title": "Craft CMS: Mass assignment via id in newAttributes during bulk duplicate overwrites existing elements"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-50281",
    "datePublished": "2026-07-02T16:02:14.029Z",
    "dateReserved": "2026-06-04T16:26:05.985Z",
    "dateUpdated": "2026-07-02T19:44:23.581Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-50281\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-02T19:33:59.852902Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-02T19:44:18.395Z\"}}], \"cna\": {\"title\": \"Craft CMS: Mass assignment via id in newAttributes during bulk duplicate overwrites existing elements\", \"source\": {\"advisory\": \"GHSA-x5m4-g2cq-52pq\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 7.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"craftcms\", \"product\": \"cms\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 5.7.0, \u003c 5.9.21\"}]}], \"references\": [{\"url\": \"https://github.com/craftcms/cms/security/advisories/GHSA-x5m4-g2cq-52pq\", \"name\": \"https://github.com/craftcms/cms/security/advisories/GHSA-x5m4-g2cq-52pq\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/craftcms/cms/commit/8f6587c25050bbb6e080d59c71f6bb8932fc8600\", \"name\": \"https://github.com/craftcms/cms/commit/8f6587c25050bbb6e080d59c71f6bb8932fc8600\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Craft CMS is a content management system (CMS). Versions 5.7.0 and above, prior to 5.9.21 contain a mass-assignment flaw in the bulk-duplicate element action. An attacker who is only able to duplicate their own entires can submit an arbitrary id through the newAttributes request parameter. The duplication routine overrides its own id = null reset with that value and writes the attacker\u0027s attributes into the victim\u0027s existing entry row. ElementsController::beforeAction() pulls the request body into $this-\u003e_attributes and rejects requests that ship an id or canonicalId key at the top level, actionBulkDuplicate(), reads a separate newAttributes array and passes it straight through to the service layer. Elements::duplicateElement() clones the source element, sets id to null, and then hands the attacker\u0027s array to Craft::configure(), which  overwrites the reset id with any numeric value inside $newAttributes. PHP Yii\u0027s saveElement() then performs an UPDATE against the row with that primary key instead of an INSERT. The attackers\u0027s title, slug, authorId, postDate, and UID land on the victim\u0027s entry. safeAttributes() on Entry includes id because the base element model exposes it, so the Collection::only() filter does not strip it. This issue has been fixed in version 5.9.21.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-915\", \"description\": \"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-02T16:02:14.029Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-50281\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-02T19:44:23.581Z\", \"dateReserved\": \"2026-06-04T16:26:05.985Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-07-02T16:02:14.029Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}