Is CVE-2003-1328 in the CISA KEV catalog?

No. CVE-2003-1328 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-1328?

CVE-2003-1328 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-1328?

CVE-2003-1328 has an EPSS score of 38.93% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-1328

HIGHEPSS 98th pctl

7.5

CVSS v2

NVD

Description

The showHelp() function in Microsoft Internet Explorer 5.01, 5.5, and 6.0 supports certain types of pluggable protocols that allow remote attackers to bypass the cross-domain security model and execute arbitrary code, aka "Improper Cross Domain Security Validation with ShowHelp functionality."

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

38.93%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.