{
  "id": "CVE-2023-46251",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2023-11-06T18:15:08.547",
  "lastModified": "2024-02-29T01:41:21.943",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": " MyBB is a free and open source forum software. Custom MyCode (BBCode) for the visual editor (_SCEditor_) doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. This weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as a post or Private Message) and operates on a maliciously crafted MyCode message. This may occur on pages where message content is pre-filled using a GET/POST parameter, or on reply pages where a previously saved malicious message is quoted. The impact is be mitigated when: 1. the visual editor is disabled globally (_Admin CP \u2192 Configuration \u2192 Settings \u2192 Clickable Smilies and BB Code: [Clickable MyCode Editor](https://github.com/mybb/mybb/blob/mybb_1836/install/resources/settings.xml#L2087-L2094)_ is set to _Off_), or 2. the visual editor is disabled for individual user accounts (_User CP \u2192 Your Profile \u2192 Edit Options_: _Show the MyCode formatting options on the posting pages_ checkbox is not checked). MyBB 1.8.37 resolves this issue with the commit `6dcaf0b4d`. Users are advised to upgrade. Users unable to upgrade may mitigate the impact without upgrading MyBB by changing the following setting (_Admin CP \u2192 Configuration \u2192 Settings_):\n- _Clickable Smilies and BB Code \u2192 [Clickable MyCode Editor](https://github.com/mybb/mybb/blob/mybb_1836/install/resources/settings.xml#L2087-L2094)_: _Off_. Similarly, individual MyBB forum users are able to disable the visual editor by diabling the account option (_User CP \u2192 Your Profile \u2192 Edit Options_) _Show the MyCode formatting options on the posting pages_."
    },
    {
      "lang": "es",
      "value": "MyBB es un software de foro gratuito y de c\u00f3digo abierto. El MyCode personalizado (BBCode) para el editor visual (_SCEditor_) no sanitiza la entrada correctamente al representar HTML, lo que genera una vulnerabilidad XSS basada en DOM. Esta debilidad se puede explotar dirigiendo a la v\u00edctima a una p\u00e1gina donde el editor visual est\u00e1 activo (por ejemplo, como una publicaci\u00f3n o mensaje privado) y opera con un mensaje MyCode creado con fines malintencionados. Esto puede ocurrir en p\u00e1ginas donde el contenido del mensaje se completa previamente mediante un par\u00e1metro GET/POST, o en p\u00e1ginas de respuesta donde se cita un mensaje malicioso previamente guardado. El impacto se mitiga cuando: \n1. el editor visual est\u00e1 deshabilitado globalmente (_Admin CP ? Configuration ? Settings ? Clickable Smilies and BB Code: [Clickable MyCode Editor](https://github.com/mybb/mybb/blob/mybb_1836/install/resources/settings.xml#L2087-L2094)_ is set to _Off_), o \n2. el editor visual est\u00e1 deshabilitado para cuentas de usuario individuales (_User CP ? Your Profile ? Edit Options_: _Show the MyCode formatting options on the posting pages_ checkbox is not checked).\nMyBB 1.8.37 resuelve este problema con el commit `6dcaf0b4d`. Se recomienda a los usuarios que actualicen. Los usuarios que no puedan actualizar pueden mitigar el impacto sin actualizar MyBB cambiando la siguiente configuraci\u00f3n (_Admin CP ? Configuration ? Settings_): - _Clickable Smilies and BB Code ? [Clickable MyCode Editor](https://github.com/mybb/mybb/blob/mybb_1836/install/resources/settings.xml#L2087-L2094)_: _Off_. \nDe manera similar, los usuarios individuales del foro MyBB pueden desactivar el editor visual marcando la opci\u00f3n de cuenta (_User CP ? Your Profile ? Edit Options_)_Show the MyCode formatting options on the posting pages_."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7
      },
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        "source": "security-advisories@github.com",
        "type": "Secondary",
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          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
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  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
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  "configurations": [
    {
      "nodes": [
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          "operator": "OR",
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          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*",
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  "references": [
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      "url": "https://github.com/mybb/mybb/commit/6dcaf0b4db6254f1833fe8dae295d9ddc2219276",
      "source": "security-advisories@github.com",
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}