CVE-2026-93756 (GCVE-0-2026-93756)
Vulnerability from cvelistv5
Published
2026-10-02 07:39
Modified
2026-10-03 15:42
Severity ?
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook Comment Message via v-html in Admin Builder Preview in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the feed builder preview page. This attack requires only a Facebook account to post a comment on the connected Facebook Page, with no WordPress credentials needed; additionally, the use of v-show rather than v-if means injected HTML — including onerror handlers — is evaluated in the DOM even when the comment section is not visually displayed. When combined with the lack of URL validation in the cff_install_addon AJAX handler (admin/addon-functions.php), an injected script running in an administrator's session can trigger arbitrary plugin installation from an attacker-controlled URL, which may result in server-side code execution.
References
Impacted products
Vendor Product Version
smub Smash Balloon Social Post Feed – Simple Social Feeds for WordPress Version: 0   ≤ 4.13.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-93756",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-03T15:29:58.438463Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-03T15:42:48.981Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Smash Balloon Social Post Feed \u2013 Simple Social Feeds for WordPress",
          "vendor": "smub",
          "versions": [
            {
              "lessThanOrEqual": "4.13.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Yuto Hyakumoto"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Smash Balloon Social Post Feed \u2013 Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook Comment Message via v-html in Admin Builder Preview in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the feed builder preview page. This attack requires only a Facebook account to post a comment on the connected Facebook Page, with no WordPress credentials needed; additionally, the use of v-show rather than v-if means injected HTML \u2014 including onerror handlers \u2014 is evaluated in the DOM even when the comment section is not visually displayed. When combined with the lack of URL validation in the cff_install_addon AJAX handler (admin/addon-functions.php), an injected script running in an administrator\u0027s session can trigger arbitrary plugin installation from an attacker-controlled URL, which may result in server-side code execution."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-02T07:39:27.358Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a4a3bc4b-bc0c-47ac-9f60-e05b300311b4?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Integrations/CFF_Graph_Url.php#L76"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L805"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/builder/templates/preview/preview-components.php#L142"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L242"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/addon-functions.php#L142"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3720826/custom-facebook-feed/trunk/admin/builder/templates/preview/preview-components.php?old=3656491\u0026old_path=custom-facebook-feed%2Ftrunk%2Fadmin%2Fbuilder%2Ftemplates%2Fpreview%2Fpreview-components.php"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-18T16:53:36.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-10-01T18:58:03.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Smash Balloon Social Post Feed \u003c= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-93756",
    "datePublished": "2026-10-02T07:39:27.358Z",
    "dateReserved": "2026-09-18T16:38:25.574Z",
    "dateUpdated": "2026-10-03T15:42:48.981Z",
    "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-2026-93756\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-03T15:29:58.438463Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-03T15:40:11.395Z\"}}], \"cna\": {\"title\": \"Smash Balloon Social Post Feed \u003c= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Yuto Hyakumoto\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.2, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"smub\", \"product\": \"Smash Balloon Social Post Feed \\u2013 Simple Social Feeds for WordPress\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.13.0\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-09-18T16:53:36.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-10-01T18:58:03.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/a4a3bc4b-bc0c-47ac-9f60-e05b300311b4?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Integrations/CFF_Graph_Url.php#L76\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L805\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/builder/templates/preview/preview-components.php#L142\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L242\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/addon-functions.php#L142\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset/3720826/custom-facebook-feed/trunk/admin/builder/templates/preview/preview-components.php?old=3656491\u0026old_path=custom-facebook-feed%2Ftrunk%2Fadmin%2Fbuilder%2Ftemplates%2Fpreview%2Fpreview-components.php\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Smash Balloon Social Post Feed \\u2013 Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook Comment Message via v-html in Admin Builder Preview in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the feed builder preview page. This attack requires only a Facebook account to post a comment on the connected Facebook Page, with no WordPress credentials needed; additionally, the use of v-show rather than v-if means injected HTML \\u2014 including onerror handlers \\u2014 is evaluated in the DOM even when the comment section is not visually displayed. When combined with the lack of URL validation in the cff_install_addon AJAX handler (admin/addon-functions.php), an injected script running in an administrator\u0027s session can trigger arbitrary plugin installation from an attacker-controlled URL, which may result in server-side code execution.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-10-02T07:39:27.358Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-93756\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-03T15:42:48.981Z\", \"dateReserved\": \"2026-09-18T16:38:25.574Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-10-02T07:39:27.358Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.