{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8365",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T12:55:53.628058Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T12:56:15.813Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Blocksy",
          "vendor": "creativethemeshq",
          "versions": [
            {
              "lessThanOrEqual": "2.1.41",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Qu\u1ed1c Huy"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Blocksy theme for WordPress is vulnerable to PHP Object Injection leading to Remote Code Execution via the \u0027blocksy_meta\u0027 REST API field and the V200 database migration in versions up to and including 2.1.35. This is due to insufficient input sanitization in the blocksy_sanitize_post_meta_options() function, which only blocks values containing \u0027\u003c\u0027 or \u0027\u003e\u0027 and does not prevent serialized PHP object strings from being stored in post meta, combined with the SearchReplacer::run_recursively() function unconditionally deserializing all string values via @unserialize() during migration without restricting allowed classes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a serialized Blocksy\\RaiiPattern object into post meta that, when the V200 migration runs on an upgraded site, is deserialized and triggers RaiiPattern::__destruct(), which executes arbitrary PHP callables via call_user_func()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502 Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-09T08:29:40.638Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/fd216743-ce8d-4632-9fd1-d63502c2dfcd?source=cve"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/inc/classes/db-versioning/utils/db-search-replacer.php#L98"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/inc/classes/db-versioning/utils/db-search-replacer.php#L98"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/admin/helpers/meta-boxes.php#L104"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/admin/helpers/meta-boxes.php#L104"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/admin/helpers/validator.php#L75"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/admin/helpers/validator.php#L75"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/trunk/inc/classes/raii.php#L12"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.41/inc/classes/raii.php#L12"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/inc/classes/db-versioning/utils/db-search-replacer.php#L98"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/admin/helpers/meta-boxes.php#L104"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/admin/helpers/validator.php#L75"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/blocksy/2.1.35/inc/classes/raii.php#L12"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-12T06:30:57.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-06-08T20:11:29.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Blocksy \u003c= 2.1.41 - Authenticated (Contributor+) PHP Object Injection via Deserialization of Untrusted Data via \u0027blocksy_meta\u0027 REST API Field"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-8365",
    "datePublished": "2026-06-09T08:29:40.638Z",
    "dateReserved": "2026-05-11T19:25:24.123Z",
    "dateUpdated": "2026-06-09T12:56:15.813Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}