CVE-2008-5551

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 14%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
—
EG Score
0.0(none)
EPSS
96.1%
KEV
Not listed

Published

December 12, 2008

Last Modified

April 23, 2026

References (8)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-06 02:19 UTCEPSS rescore
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  10. 2026-06-30 23:19 UTCEPSS rescore
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  1. 2026-06-18 17:49 UTCEPSS rescore
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  20. 2026-06-04 13:09 UTCEPSS rescore
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  24. 2026-05-31 22:28 UTCEPSS rescore
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  26. 2026-05-31 00:13 UTCEPSS rescore
  27. 2026-05-31 00:13 UTCEPSS rescore
  28. 2026-05-30 19:08 UTCEG score recompute
  29. 2026-05-30 19:08 UTCGHSA enrichment
  30. 2026-05-29 13:40 UTCEPSS rescore
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  38. 2026-05-26 07:16 UTCEPSS rescore
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  40. 2026-05-24 16:43 UTCEPSS rescore
  41. 2026-05-20 22:37 UTCEPSS rescore
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  43. 2026-05-20 11:20 UTCEPSS rescore
  44. 2026-05-20 11:20 UTCEPSS rescore
  45. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-32654✓ verified
    First seen Dec 11, 2008

    Microsoft Internet Explorer 8 - CSS 'expression' Property Cross-Site Scripting Filter Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2008-5551?
CVE-2008-5551 is a none vulnerability published on December 12, 2008. 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."
When was CVE-2008-5551 disclosed?
CVE-2008-5551 was first published in the National Vulnerability Database on December 12, 2008, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2008-5551 actively exploited?
CVE-2008-5551 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2008-5551?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2008-5551, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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