CVE-2008-5551

Status: ModifiedMedium (4.3)—💥 Exploit

The XSS Filter in Microsoft Internet Explorer 8.0 Beta 2 allows remote attackers to bypass the XSS protection mechanism and conduct XSS attacks by injecting data at two different positions within an HTML document, related to STYLE elements and the CSS expression property, aka a "double injection."

CVSS

Version: 2.0
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Base score: 4.3

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 14%
Percentile among all scored CVEs: 96
Score date: 10/9/2026

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Microsoft Internet Explorer 8 - CSS 'expression' Property Cross-Site Scripting Filter Bypass (12/11/2008)

Affected technologies (1)

Microsoft — Internet Explorer

CWEs

CWE-79

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2008-5551",
  "cveTags": [],
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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,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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  "published": "2008-12-12T18:30:03.280",
  "references": [
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      "url": "http://securityreason.com/securityalert/4724",
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      "url": "http://www.securityfocus.com/archive/1/499124/100/0/threaded",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-79"
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  "descriptions": [
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      "lang": "en",
      "value": "The XSS Filter in Microsoft Internet Explorer 8.0 Beta 2 allows remote attackers to bypass the XSS protection mechanism and conduct XSS attacks by injecting data at two different positions within an HTML document, related to STYLE elements and the CSS expression property, aka a \"double injection.\""
    },
    {
      "lang": "es",
      "value": "El filtro XSS (ejecución de secuencias de comandos en sitios cruzados) en Microsoft Internet Explorer 8.0 Beta 2 permite a atacantes remotos saltar el mecanismo de protección XSS y generar ataques XSS mediante la inyección de datos en dos posiciones diferentes en un documento HTML, relacionado con elementos STYLE y la propiedad CSS expression, alias una \"doble inyección\"."
    }
  ],
  "lastModified": "2026-06-16T23:00:31.803",
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  "sourceIdentifier": "cve@mitre.org"
}