Is CVE-2008-5551 being actively exploited?

CVE-2008-5551 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-5551?

CVE-2008-5551 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2008-5551

MEDIUM · CVSS 4.3EPSS 14.0%EU EUVD

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."

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE): CWE-79
EPSS score: 14.0% (97th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-5526)
Published: December 12, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-5526 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / internet explorer

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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