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CVE-2026-31805

Estado: AnalizadaAlta (8.2)—

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an authorization bypass in the poll plugin allowed authenticated users to vote on, remove votes from, or toggle the open/closed status of polls they did not have access to. By passing post_id as an array (e.g. post_id[]=&post_id[]=), the authorization check resolves to the accessible post while the poll lookup resolves to a different post's poll. This affects the vote, remove_vote, and toggle_status endpoints in DiscoursePoll::PollsController. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de autenticación en aplicación web expuesta (AV:N, PR:N). Bypass de autorización permite acceso no autorizado a recursos (T1078) y manipulación de datos de encuestas (I:H, T1565).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementNetwork SegmentationApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (1)

Discourse — Discourse

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-31805",
  "cveTags": [],
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              "technicalImpact": "partial"
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          "version": "2.0.3",
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          "value": "CWE-20"
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      "lang": "en",
      "value": "Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an authorization bypass in the poll plugin allowed authenticated users to vote on, remove votes from, or toggle the open/closed status of polls they did not have access to. By passing post_id as an array (e.g. post_id[]=&post_id[]=), the authorization check resolves to the accessible post while the poll lookup resolves to a different post's poll. This affects the vote, remove_vote, and toggle_status endpoints in DiscoursePoll::PollsController. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch."
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      "value": "Discourse es una plataforma de discusión de código abierto. Antes de las versiones 2026.3.0-latest.1, 2026.2.1 y 2026.1.2, una omisión de autorización en el plugin de encuestas permitía a usuarios autenticados votar en, eliminar votos de, o alternar el estado abierto/cerrado de encuestas a las que no tenían acceso. Al pasar post_id como un array (p. ej., post_id[]=&amp;post_id[]=), la verificación de autorización se resuelve al post accesible mientras que la búsqueda de la encuesta se resuelve a la encuesta de un post diferente. Esto afecta a los endpoints vote, remove_vote y toggle_status en DiscoursePoll::PollsController. Las versiones 2026.3.0-latest.1, 2026.2.1 y 2026.1.2 contienen un parche."
    }
  ],
  "lastModified": "2026-06-17T10:34:29.713",
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