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CVE-2021-34658

Estado: ModificadaMedia (6.1)—

The Simple Popup Newsletter WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/simple-popup-newsletter.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.7.

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).

Tecnologías afectadas (1)

Keszites — Simple Popup Newsletter

CWE

Referencias

JSON original (NVD)

Mostrar
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-05-23T20:02:49.296941Z"
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
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          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
          "scope": "CHANGED",
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  "published": "2021-08-16T19:15:15.227",
  "references": [
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "security@wordfence.com",
      "description": [
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          "value": "CWE-79"
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      "value": "The Simple Popup Newsletter WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/simple-popup-newsletter.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.7."
    },
    {
      "lang": "es",
      "value": "El plugin Simple Popup Newsletter de WordPress, es vulnerable a un ataque de tipo Cross-Site Scripting Reflejado debido al uso de la función $_SERVER[\"PHP_SELF\"] en el archivo ~/simple-popup-newsletter.php que permite a atacantes inyectar scripts web arbitrario, en versiones hasta 1.4.7 incluyéndola."
    }
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  "lastModified": "2026-06-17T03:56:19.210",
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  "sourceIdentifier": "security@wordfence.com"
}