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CVE-2021-45115

Estado: ModificadaAlta (7.5)—

An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and 4.0 before 4.0.1. UserAttributeSimilarityValidator incurred significant overhead in evaluating a submitted password that was artificially large in relation to the comparison values. In a situation where access to user registration was unrestricted, this provided a potential vector for a denial-of-service attack.

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).

Tecnologías afectadas (2)

Djangoproject — DjangoFedoraproject — Fedora

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-45115",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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  "affected": [
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      "affectedData": [
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  "published": "2022-01-05T00:15:07.907",
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      "value": "An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and 4.0 before 4.0.1. UserAttributeSimilarityValidator incurred significant overhead in evaluating a submitted password that was artificially large in relation to the comparison values. In a situation where access to user registration was unrestricted, this provided a potential vector for a denial-of-service attack."
    },
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      "lang": "es",
      "value": "Se ha detectado un problema en Django versiones 2.2 anteriores a 2.2.26, 3.2 anteriores a 3.2.11 y 4.0 anteriores a 4.0.1. UserAttributeSimilarityValidator incurría en una sobrecarga significativa al evaluar una contraseña enviada que era artificialmente grande en relación con los valores de comparación. En una situación en la que el acceso al registro de usuarios no estaba restringido, esto proporcionaba un vector potencial para un ataque de denegación de servicio."
    }
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  "lastModified": "2026-06-17T04:13:11.547",
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