FKIE_CVE-2026-1543

Vulnerability from fkie_nvd - Published: 2026-05-21 05:16 - Updated: 2026-07-23 15:10
Severity
6.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Summary
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 3.15.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator) accesses a page displaying dynamic user data (such as via the Dynamic Data feature pulling user biographical information).
References
security@wordfence.comhttps://avada.com/documentation/avada-changelog/
security@wordfence.comhttps://themeforest.net/item/avada-responsive-multipurpose-theme/2833226
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/72a6b040-ed02-4561-82f2-4adb820bdf7d?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Avada (Fusion) Builder",
          "vendor": "themefusion",
          "versions": [
            {
              "lessThanOrEqual": "3.15.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 3.15.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator) accesses a page displaying dynamic user data (such as via the Dynamic Data feature pulling user biographical information)."
    },
    {
      "lang": "es",
      "value": "El plugin Avada (Fusion) Builder para WordPress es vulnerable a Cross-Site Scripting Almacenado a trav\u00e9s de m\u00faltiples shortcodes en todas las versiones hasta la 3.15.2, inclusive, debido a una sanitizaci\u00f3n de entrada y un escape de salida insuficientes. Esto hace posible que atacantes autenticados, con acceso de nivel Suscriptor y superior, inyecten scripts web arbitrarios en p\u00e1ginas que se ejecutar\u00e1n cada vez que un usuario (t\u00edpicamente un administrador) acceda a una p\u00e1gina que muestre datos de usuario din\u00e1micos (como a trav\u00e9s de la funci\u00f3n de Datos Din\u00e1micos que extrae informaci\u00f3n biogr\u00e1fica del usuario)."
    }
  ],
  "id": "CVE-2026-1543",
  "lastModified": "2026-07-23T15:10:00.137",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-1543",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-21T12:08:33.211244Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-21T05:16:22.257",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://avada.com/documentation/avada-changelog/"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://themeforest.net/item/avada-responsive-multipurpose-theme/2833226"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/72a6b040-ed02-4561-82f2-4adb820bdf7d?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}



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Sightings

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.