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CVE-2018-20824

Estado: ModificadaMedia (6.1)—💥 Exploit

The WallboardServlet resource in Jira before version 7.13.1 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the cyclePeriod parameter.

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Tecnologías afectadas (1)

Atlassian — Jira

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-20824",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@atlassian.com",
      "affectedData": [
        {
          "vendor": "Atlassian",
          "product": "Jira",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "7.13.1",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-05-03T20:29:00.310",
  "references": [
    {
      "url": "https://jira.atlassian.com/browse/JRASERVER-69238",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "security@atlassian.com"
    },
    {
      "url": "https://jira.atlassian.com/browse/JRASERVER-69238",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The WallboardServlet resource in Jira before version 7.13.1 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the cyclePeriod parameter."
    },
    {
      "lang": "es",
      "value": "El recurso WallboardServlet en Jira en versiones anteriores a la 7.13.1 permite a los atacantes remotos inyectar HTML o JavaScript arbitrarios a través de una vulnerabilidad XSS (Cross Site Scripting) en el parámetro cyclePeriod."
    }
  ],
  "lastModified": "2026-06-17T01:53:33.153",
  "configurations": [
    {
      "nodes": [
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              "versionEndExcluding": "7.13.1"
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  "sourceIdentifier": "security@atlassian.com"
}