FKIE_CVE-2026-3534

Vulnerability from fkie_nvd - Published: 2026-03-11 07:16 - Updated: 2026-04-22 21:27
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 Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `ast-page-background-meta` and `ast-content-background-meta` post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient input sanitization on meta registration and missing output escaping in the `astra_get_responsive_background_obj()` function for four CSS-context sub-properties (`background-color`, `background-image`, `overlay-color`, `overlay-gradient`). 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.
References
security@wordfence.comhttps://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1629
security@wordfence.comhttps://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1640
security@wordfence.comhttps://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1380
security@wordfence.comhttps://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1386
security@wordfence.comhttps://themes.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=316958%40astra%2F4.12.4&old=312219%40astra%2F4.12.3
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6d-36a02023f658?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `ast-page-background-meta` and `ast-content-background-meta` post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient input sanitization on meta registration and missing output escaping in the `astra_get_responsive_background_obj()` function for four CSS-context sub-properties (`background-color`, `background-image`, `overlay-color`, `overlay-gradient`). 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."
    },
    {
      "lang": "es",
      "value": "El tema Astra para WordPress es vulnerable a Cross-Site Scripting Almacenado a trav\u00e9s de los campos de metadatos de publicaci\u00f3n \u0027ast-page-background-meta\u0027 y \u0027ast-content-background-meta\u0027 en todas las versiones hasta la 4.12.3, inclusive. Esto se debe a una sanitizaci\u00f3n de entrada insuficiente en el registro de metadatos y a una falta de escape de salida en la funci\u00f3n \u0027astra_get_responsive_background_obj()\u0027 para cuatro subpropiedades de contexto CSS (\u0027background-color\u0027, \u0027background-image\u0027, \u0027overlay-color\u0027, \u0027overlay-gradient\u0027). Esto hace posible que atacantes autenticados, con acceso de nivel Colaborador y superior, inyecten scripts web arbitrarios en p\u00e1ginas que se ejecutar\u00e1n cada vez que un usuario acceda a una p\u00e1gina inyectada."
    }
  ],
  "id": "CVE-2026-3534",
  "lastModified": "2026-04-22T21:27:27.950",
  "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"
      }
    ]
  },
  "published": "2026-03-11T07:16:45.213",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1629"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1640"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1380"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1386"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://themes.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=316958%40astra%2F4.12.4\u0026old=312219%40astra%2F4.12.3"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6d-36a02023f658?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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