{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-27T03:04:08.897","vulnerabilities":[{"cve":{"id":"CVE-2021-32671","sourceIdentifier":"security-advisories@github.com","published":"2021-06-07T22:15:07.743","lastModified":"2024-11-21T06:07:29.993","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Flarum is a forum software for building communities. Flarum's translation system allowed for string inputs to be converted into HTML DOM nodes when rendered. This change was made after v0.1.0-beta.16 (our last beta before v1.0.0) and was not noticed or documented. This allowed for any user to type malicious HTML markup within certain user input fields and have this execute on client browsers. The example which led to the discovery of this vulnerability was in the forum search box. Entering faux-malicious HTML markup, such as <script>alert('test')</script> resulted in an alert box appearing on the forum. This attack could also be modified to perform AJAX requests on behalf of a user, possibly deleting discussions, modifying their settings or profile, or even modifying settings on the Admin panel if the attack was targetted towards a privileged user. All Flarum communities that run flarum v1.0.0 or v1.0.1 are impacted. The vulnerability has been fixed and published as flarum/core v1.0.2. All communities running Flarum v1.0 have to upgrade as soon as possible to v1.0.2."},{"lang":"es","value":"\"Flarum es un software de foros para construir comunidades. El sistema de traducción de Flarum permitía que las entradas de cadena se convirtieran en nodos HTML DOM cuando son renderizadas. Este cambio se realizó después de la versión v0.1.0-beta.16 (nuestra última beta versiones anteriores a v1.0.0) y no fue advertido ni documentado. Esto permitía que cualquier usuario escribiera marcas HTML maliciosas dentro de determinados campos de entrada del usuario y que éstas se ejecutaran en los navegadores de los clientes. El ejemplo que condujo al descubrimiento de esta vulnerabilidad fue en el cuadro de búsqueda del foro. La introducción de marcas HTML falsamente maliciosas, como (script)alert(\"\"test\"\")(/script) resultado a la aparición de un cuadro de alerta en el foro. Este ataque también podía ser modificado para llevar a cabo peticiones AJAX en nombre de un usuario, posiblemente borrando discusiones, modificando su configuración o perfil, o incluso modificando la configuración en el panel de administración si el ataque estaba dirigido a un usuario privilegiado. Todas las comunidades de Flarum que ejecutan flarum versiones v1.0.0 o v1.0.1 están afectadas. La vulnerabilidad ha sido corregida y publicada como flarum/core versión v1.0.2. Todas las comunidades que ejecutan Flarum versión v1.0, tienen que actualizar lo antes posible a la v1.0.2"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":6.0},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":6.0}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}]},"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:flarum:flarum:1.0.0:*:*:*:*:*:*:*","matchCriteriaId":"3241FCD1-F5B7-4447-8FF9-6C02EEBB846D"},{"vulnerable":true,"criteria":"cpe:2.3:a:flarum:flarum:1.0.1:*:*:*:*:*:*:*","matchCriteriaId":"48C22B7B-9BD3-4AA4-9DB7-1CE3D837E5C2"}]}]}],"references":[{"url":"https://github.com/flarum/core/commit/440bed81b8019dff00642c8f493b4909d505a28a","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/flarum/core/security/advisories/GHSA-5qjq-69w6-fg57","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://packagist.org/packages/flarum/core","source":"security-advisories@github.com","tags":["Product","Third Party Advisory"]},{"url":"https://github.com/flarum/core/commit/440bed81b8019dff00642c8f493b4909d505a28a","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/flarum/core/security/advisories/GHSA-5qjq-69w6-fg57","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://packagist.org/packages/flarum/core","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product","Third Party Advisory"]}]}}]}