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CVE-2021-24518

Estado: ModificadaMedia (4.8)—

The WPFront Notification Bar WordPress plugin before 2.0.0.07176 does not sanitise or escape its Custom CSS setting, allowing high privilege users such as admin to set XSS payload in it even when the unfiltered_html capability is disallowed, leading to an authenticated Stored Cross-Site Scripting issue

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 (1)

Wpfront — Notification BAR

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-24518",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 4.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 1.7
      }
    ]
  },
  "affected": [
    {
      "source": "contact@wpscan.com",
      "affectedData": [
        {
          "vendor": "Unknown",
          "product": "WPFront Notification Bar",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.0.07176",
              "lessThan": "2.0.0.07176",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-16T11:15:08.593",
  "references": [
    {
      "url": "https://packetstormsecurity.com/files/163472/",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://wpscan.com/vulnerability/53103cdc-a4bf-40fa-aeb1-790fc7a65f0a",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "contact@wpscan.com"
    },
    {
      "url": "https://packetstormsecurity.com/files/163472/",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://wpscan.com/vulnerability/53103cdc-a4bf-40fa-aeb1-790fc7a65f0a",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "contact@wpscan.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The WPFront Notification Bar WordPress plugin before 2.0.0.07176 does not sanitise or escape its Custom CSS setting, allowing high privilege users such as admin to set XSS payload in it even when the unfiltered_html capability is disallowed, leading to an authenticated Stored Cross-Site Scripting issue"
    },
    {
      "lang": "es",
      "value": "El plugin de WordPress WPFront Notification Bar versiones anteriores a 2.0.0.07176, no sanea ni escapa de su configuración CSS personalizada, permitiendo a usuarios con privilegios elevados, como el administrador, ajustar una carga útil de tipo XSS en ella incluso cuando la capacidad unfiltered_html no está permitida, conllevando a un problema de tipo Cross-Site Scripting Almacenado y autenticado."
    }
  ],
  "lastModified": "2026-06-17T03:40:10.240",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wpfront:notification_bar:*:*:*:*:*:wordpress:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5FA6240D-3B1F-411C-AC02-014D2DA1F877",
              "versionEndExcluding": "2.0.0.07176"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "contact@wpscan.com"
}