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CVE-2026-84909

Estado: AplazadaMedia (6.4)—

The Custom Twitter Feeds – A Tweets Widget or X Feed Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute in all versions up to, and including, 2.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is exploitable on common installs where the admin has configured access tokens with zero or multiple legacy feeds, as this causes the ctf_statuses support_legacy_shortcode option to be set to boolean true by default, activating the unfiltered legacy shortcode attribute code path.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

CWE-79 (XSS) en plugin WordPress expuesto públicamente (AV:N, PR:L). Autenticado inyecta scripts en shortcode 'buttoncolor' que se ejecutan en navegadores de usuarios (T1059.007, T1189). Requiere acceso inicial como contributor.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningRestrict Web-Based ContentPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network Traffic

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Smashballoon — Custom Twitter FeedsAI

CWE

Referencias

JSON original (NVD)

Mostrar
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        "ssvcData": {
          "id": "CVE-2026-84909",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-18T14:16:07.796663Z"
        }
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    "cvssMetricV31": [
      {
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "confidentialityImpact": "LOW"
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          "vendor": "smub",
          "product": "Custom Twitter Feeds – A Tweets Widget or X Feed Widget",
          "versions": [
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  "published": "2026-09-18T07:16:50.390",
  "references": [
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      "url": "https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/custom-twitter-feed.php#L432",
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      "url": "https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Parse.php#L551",
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      "url": "https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2001",
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      "url": "https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2338",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3695675%40custom-twitter-feeds&old=3665650%40custom-twitter-feeds",
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    {
      "lang": "en",
      "value": "The Custom Twitter Feeds – A Tweets Widget or X Feed Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute in all versions up to, and including, 2.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is exploitable on common installs where the admin has configured access tokens with zero or multiple legacy feeds, as this causes the ctf_statuses support_legacy_shortcode option to be set to boolean true by default, activating the unfiltered legacy shortcode attribute code path."
    }
  ],
  "lastModified": "2026-09-18T15:17:14.100",
  "sourceIdentifier": "security@wordfence.com"
}