CVE-2026-4804

{
  "id": "CVE-2026-4804",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-03T09:16:37.520",
  "lastModified": "2026-10-25T21:10:00.770",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Zakra theme for WordPress is vulnerable to Stored Cross-Site Scripting via post meta values in all versions up to, and including, 4.2.0. This is due to the theme registering three post meta fields (zakra_menu_item_color, zakra_menu_item_hover_color, and zakra_menu_item_active_color) with 'show_in_rest' => true and 'auth_callback' => '__return_true', but without any sanitize_callback parameter in the register_post_meta() calls. While the classic editor save path applies sanitize_hex_color() sanitization, the REST API path completely bypasses this protection. The unsanitized meta values are then retrieved via get_post_meta() and concatenated directly into CSS strings that are output through wp_add_inline_style() without any 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 the injected page."
    },
    {
      "lang": "es",
      "value": "El tema Zakra para WordPress es vulnerable a cross-site scripting almacenado a través de valores meta de publicación en todas las versiones hasta, e incluyendo, la 4.2.0. Esto se debe a que el tema registra tres campos meta de publicación (zakra_menu_item_color, zakra_menu_item_hover_color y zakra_menu_item_active_color) con ’show_in_rest’ => true y ’auth_callback’ => ’__return_true’, pero sin ningún parámetro sanitize_callback en las llamadas a register_post_meta(). Mientras que la ruta de guardado del editor clásico aplica la sanitización sanitize_hex_color(), la ruta de la API REST omite completamente esta protección. Los valores meta no sanitizados son luego recuperados a través de get_post_meta() y concatenados directamente en cadenas CSS que se emiten a través de wp_add_inline_style() sin ningún escape. Esto hace posible que atacantes autenticados, con acceso de nivel Colaborador y superior, inyecten scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a la página inyectada."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "themegrill",
          "product": "Zakra",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "4.2.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-06T16:25:36.489784Z",
          "id": "CVE-2026-4804",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://themes.trac.wordpress.org/changeset?reponame=&new=330192%40zakra%2F4.2.1&old=297420%40zakra%2F4.2.0#file39",
      "source": "[email protected]"
    },
    {
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/bbda67a3-0413-4d8e-8157-84c9c87b8695?source=cve",
      "source": "[email protected]"
    }
  ]
}