CVE-2003-1025

CVE-2003-1025 is a medium-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Description

Internet Explorer 5.01 through 6 SP1 allows remote attackers to spoof the domain of a URL via a "%01" character before an @ sign in the user@domain portion of the URL, which hides the rest of the URL, including the real site, in the address bar, aka the "Improper URL Canonicalization Vulnerability."

Frequently asked questions

What is CVE-2003-1025?
Internet Explorer 5.01 through 6 SP1 allows remote attackers to spoof the domain of a URL via a "%01" character before an @ sign in the user@domain portion of the URL, which hides the rest of the URL, including the real site, in the address bar, aka the "Improper URL Canonicalization Vulnerability."
How severe is CVE-2003-1025?
CVE-2003-1025 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2003-1025 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1025?
CVE-2003-1025 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2003-1025?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-1025 published?
CVE-2003-1025 was published on 2004-01-20 and last updated on 2026-06-16.

References

Affected products (1)

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