CVE-2026-4300

{
  "id": "CVE-2026-4300",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4300",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-08T14:17:41.302256Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@wordfence.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.4,
          "attackVector": "NETWORK",
          "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",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "security@wordfence.com",
      "affectedData": [
        {
          "vendor": "robosoft",
          "product": "Robo Gallery – Photo & Image Slider",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "5.1.3"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-04-08T10:16:01.953",
  "references": [
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/tags/5.1.3/includes/frontend/modules/base-grid/grid/grid.v1.php#L89",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/tags/5.1.3/includes/frontend/modules/base-grid/layout.v1.php#L101",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/tags/5.1.3/includes/frontend/modules/base-grid/layout.v1.php#L52",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/tags/5.1.3/includes/frontend/modules/class/jsoptions.php#L87",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/tags/5.1.3/includes/frontend/modules/class/jsoptions.php#L97",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/tags/5.1.3/includes/options/rbs_gallery_options_loading.php#L95",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/trunk/includes/frontend/modules/base-grid/grid/grid.v1.php#L89",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/trunk/includes/frontend/modules/base-grid/layout.v1.php#L101",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/trunk/includes/frontend/modules/base-grid/layout.v1.php#L52",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/trunk/includes/frontend/modules/class/jsoptions.php#L87",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/trunk/includes/frontend/modules/class/jsoptions.php#L97",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/robo-gallery/trunk/includes/options/rbs_gallery_options_loading.php#L95",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3488182%40robo-gallery&new=3488182%40robo-gallery&sfp_email=&sfph_mail=",
      "source": "security@wordfence.com"
    },
    {
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d8693b7d-693f-450a-89ef-e936a8813ca9?source=cve",
      "source": "security@wordfence.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@wordfence.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Robo Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Loading Label' setting in all versions up to, and including, 5.1.3. The plugin uses a custom `|***...***|` marker pattern in its `fixJsFunction()` method to embed raw JavaScript function references within JSON-encoded configuration objects. When a gallery's options are rendered on the frontend, `json_encode()` wraps all string values in double quotes. The `fixJsFunction()` method then strips the `\"|***` and `***|\"` sequences, effectively converting a JSON string value into raw JavaScript code. The Loading Label field (stored as `rbs_gallery_LoadingWord` post_meta) is an `rbstext` type field that is sanitized with `sanitize_text_field()` on save. While this strips HTML tags, it does not strip the `|***...***|` markers since they contain no HTML. When a user inputs `|***alert(document.domain)***|`, the value passes through sanitization intact, is stored in post_meta, and is later retrieved and output within an inline `<script>` tag via `renderMainBlock()` with the quote markers stripped — resulting in arbitrary JavaScript execution. The gallery post type uses `capability_type => 'post'`, allowing Author-level users to create galleries. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page containing the gallery shortcode."
    },
    {
      "lang": "es",
      "value": "El plugin Robo Gallery para WordPress es vulnerable a cross-site scripting almacenado a través de la configuración  Loading Label  en todas las versiones hasta, e incluyendo, la 5.1.3. El plugin utiliza un patrón de marcador personalizado '| ... |' en su método 'fixJsFunction()' para incrustar referencias de funciones JavaScript en bruto dentro de objetos de configuración codificados en JSON. Cuando las opciones de una galería se renderizan en el frontend, 'json_encode()' envuelve todos los valores de cadena entre comillas dobles. El método 'fixJsFunction()' luego elimina las secuencias   \"|    y    |\"  , convirtiendo efectivamente un valor de cadena JSON en código JavaScript en bruto. El campo Loading Label (almacenado como 'rbs_gallery_LoadingWord' post_meta) es un campo de tipo 'rbstext' que se sanitiza con 'sanitize_text_field()' al guardar. Si bien esto elimina las etiquetas HTML, no elimina los marcadores '| ... |' ya que no contienen HTML. Cuando un usuario introduce '| alert(document.domain) |', el valor pasa por la sanitización intacto, se almacena en post_meta, y luego se recupera y se muestra dentro de una etiqueta ' script ' en línea a través de 'renderMainBlock()' con los marcadores de comillas eliminados - lo que resulta en la ejecución arbitraria de JavaScript. El tipo de publicación de galería utiliza 'capability_type =   post ', permitiendo a los usuarios con nivel de Autor crear galerías. Esto hace posible que atacantes autenticados, con acceso de nivel de Autor y superior, inyecten scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página que contenga el shortcode de la galería."
    }
  ],
  "lastModified": "2026-07-24T20:10:00.147",
  "sourceIdentifier": "security@wordfence.com"
}