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CVE-2020-9343

Status: ModifiedMedium (6.5)—

An issue was discovered in signotec signoPAD-API/Web (formerly Websocket Pad Server) before 3.1.1 on Windows. It is possible to perform a Denial of Service attack because the implementation doesn't limit the parsing of nested JSON structures. If a victim visits an attacker-controlled website, this vulnerability can be exploited via WebSocket data with a deeply nested JSON array.

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)

Signotec — Signopad-api/web

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-9343",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
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          "availabilityImpact": "HIGH",
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          "confidentialityImpact": "NONE"
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  "affected": [
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  "published": "2020-03-20T03:15:13.667",
  "references": [
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  "descriptions": [
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      "value": "An issue was discovered in signotec signoPAD-API/Web (formerly Websocket Pad Server) before 3.1.1 on Windows. It is possible to perform a Denial of Service attack because the implementation doesn't limit the parsing of nested JSON structures. If a victim visits an attacker-controlled website, this vulnerability can be exploited via WebSocket data with a deeply nested JSON array."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en signotec signoPAD-API/Web (anteriormente Websocket Pad Server) versiones anteriores a 3.1.1 en Windows. Es posible llevar a cabo un ataque de Denegación de Servicio porque la implementación no limita el análisis de estructuras JSON anidadas. Si una víctima visita un sitio web controlado por el atacante, esta vulnerabilidad puede ser explotada por medio de los datos de WebSocket con una matriz JSON profundamente anidada."
    }
  ],
  "lastModified": "2026-06-17T03:27:47.333",
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