{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T13:56:51.863","vulnerabilities":[{"cve":{"id":"CVE-2023-46251","sourceIdentifier":"security-advisories@github.com","published":"2023-11-06T18:15:08.547","lastModified":"2024-11-21T08:28:10.273","vulnStatus":"Modified","cveTags":[],"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 → 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_), or 2. the visual editor is disabled for individual user accounts (_User CP → Your Profile → 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 → Configuration → Settings_):\n- _Clickable Smilies and BB Code → [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 → Your Profile → Edit Options_) _Show the MyCode formatting options on the posting pages_."},{"lang":"es","value":"MyBB es un software de foro gratuito y de código 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 víctima a una página donde el editor visual está activo (por ejemplo, como una publicación o mensaje privado) y opera con un mensaje MyCode creado con fines malintencionados. Esto puede ocurrir en páginas donde el contenido del mensaje se completa previamente mediante un parámetro GET/POST, o en páginas de respuesta donde se cita un mensaje malicioso previamente guardado. El impacto se mitiga cuando: \n1. el editor visual está 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 está 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 configuración (_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 opción de cuenta (_User CP ? Your Profile ? Edit Options_)_Show the MyCode formatting options on the posting pages_."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.6,"impactScore":5.9},{"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","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*","versionEndExcluding":"1.8.37","matchCriteriaId":"EC8DBC6D-0D47-46D6-A840-36BF42F37437"}]}]}],"references":[{"url":"https://github.com/mybb/mybb/commit/6dcaf0b4db6254f1833fe8dae295d9ddc2219276","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/mybb/mybb/security/advisories/GHSA-wj33-q7vj-9fr8","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://mybb.com/versions/1.8.37/","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/mybb/mybb/commit/6dcaf0b4db6254f1833fe8dae295d9ddc2219276","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://github.com/mybb/mybb/security/advisories/GHSA-wj33-q7vj-9fr8","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://mybb.com/versions/1.8.37/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes"]}]}}]}