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CVE-2021-43793

Status: ModifiedMedium (4.3)—

Discourse is an open source discussion platform. In affected versions a vulnerability in the Polls feature allowed users to vote multiple times in a single-option poll. The problem is patched in the latest tests-passed, beta and stable versions of Discourse

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Discourse — Discourse

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-43793",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "userInteraction": "NONE",
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          "vendor": "discourse",
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  "published": "2021-12-01T20:15:08.587",
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      "url": "https://github.com/discourse/discourse/commit/0c6b9df77bac9c6f7c7e2eadf6fe100064afdeab",
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  "vulnStatus": "Modified",
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      "description": [
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          "value": "CWE-269"
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    {
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "NVD-CWE-Other"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Discourse is an open source discussion platform. In affected versions a vulnerability in the Polls feature allowed users to vote multiple times in a single-option poll. The problem is patched in the latest tests-passed, beta and stable versions of Discourse"
    },
    {
      "lang": "es",
      "value": "Discourse es una plataforma de debate de código abierto. En las versiones afectadas, una vulnerabilidad en la funcionalidad Polls permitía a usuarios votar varias veces en una encuesta de una sola opción. El problema se ha parcheado en las últimas versiones de Discourse, tanto en fase beta como en versión estable"
    }
  ],
  "lastModified": "2026-06-17T04:11:27.067",
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