CVE-2026-75017 (GCVE-0-2026-75017)
Vulnerability from cvelistv5
Published
2026-09-18 06:38
Modified
2026-09-18 14:31
CWE
Summary
The Magazine Blocks – Blog Designer, Magazine & Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.8.6. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to demote administrator-owned published builder templates (header, footer, front page, single, archive, 404, and search) to draft status and replace them with attacker-authored block content rendered site-wide, enabling defacement, phishing, and SEO spam. This is possible because the mzb-builder-template post type is registered with capability_type='post' and exposed via the REST API, and the _mzb_template meta key is accessible to any user with edit_posts capability, meaning Contributor-level users and above can trigger the vulnerable save_post() hook.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75017",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-18T14:15:52.728734Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-18T14:31:44.242Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Magazine Blocks \u2013 Blog Designer, Magazine \u0026 Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid",
          "vendor": "wpblockart",
          "versions": [
            {
              "lessThanOrEqual": "1.8.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Wordfence PRISM"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Magazine Blocks \u2013 Blog Designer, Magazine \u0026 Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.8.6. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to demote administrator-owned published builder templates (header, footer, front page, single, archive, 404, and search) to draft status and replace them with attacker-authored block content rendered site-wide, enabling defacement, phishing, and SEO spam. This is possible because the mzb-builder-template post type is registered with capability_type=\u0027post\u0027 and exposed via the REST API, and the _mzb_template meta key is accessible to any user with edit_posts capability, meaning Contributor-level users and above can trigger the vulnerable save_post() hook."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T06:38:54.045Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/7f66d26a-8eb7-4b29-bb7f-afdd762be4b2?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L56"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L116"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L138"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/MagazineBlocks.php#L98"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3656574%40magazine-blocks\u0026new=3656574%40magazine-blocks"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-19T04:13:42.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-17T18:37:21.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Magazine Blocks \u003c= 1.8.6 - Missing Authorization to Authenticated (Contributor+) Arbitrary Post Modification / Site-Wide Template Takeover via Builder Templates REST Endpoint"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-75017",
    "datePublished": "2026-09-18T06:38:54.045Z",
    "dateReserved": "2026-08-17T13:09:51.578Z",
    "dateUpdated": "2026-09-18T14:31:44.242Z",
    "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-2026-75017\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-18T14:15:52.728734Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-18T14:29:57.975Z\"}}], \"cna\": {\"title\": \"Magazine Blocks \u003c= 1.8.6 - Missing Authorization to Authenticated (Contributor+) Arbitrary Post Modification / Site-Wide Template Takeover via Builder Templates REST Endpoint\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Wordfence PRISM\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"wpblockart\", \"product\": \"Magazine Blocks \\u2013 Blog Designer, Magazine \u0026 Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"1.8.6\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-08-19T04:13:42.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-09-17T18:37:21.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/7f66d26a-8eb7-4b29-bb7f-afdd762be4b2?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L56\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L116\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/PostTypes/SiteBuilder.php#L138\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/includes/MagazineBlocks.php#L98\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3656574%40magazine-blocks\u0026new=3656574%40magazine-blocks\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Magazine Blocks \\u2013 Blog Designer, Magazine \u0026 Newspaper Website Builder, Page Builder with Posts Blocks, Post Grid plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.8.6. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to demote administrator-owned published builder templates (header, footer, front page, single, archive, 404, and search) to draft status and replace them with attacker-authored block content rendered site-wide, enabling defacement, phishing, and SEO spam. This is possible because the mzb-builder-template post type is registered with capability_type=\u0027post\u0027 and exposed via the REST API, and the _mzb_template meta key is accessible to any user with edit_posts capability, meaning Contributor-level users and above can trigger the vulnerable save_post() hook.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-862\", \"description\": \"CWE-862 Missing Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-09-18T06:38:54.045Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-75017\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-18T14:31:44.242Z\", \"dateReserved\": \"2026-08-17T13:09:51.578Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-09-18T06:38:54.045Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…