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CVE-2003-1025

33
FAUCET Score

CVE-2003-1025 describes an "Improper URL Canonicalization Vulnerability" affecting Microsoft Internet Explorer versions 5.01 through 6 SP1. This flaw allows remote attackers to spoof a URL's domain by inserting a "%01" character before an "@" sign in the user@domain portion, effectively hiding the true destination in the address bar. The vulnerability has a CVSS score of 4.3, indicating a medium severity. It can be exploited remotely with medium attack complexity, leading to a potential impact of partial integrity loss (spoofing) without affecting confidentiality or availability. While not listed on the KEV catalog, exploit code for similar URI display obfuscation issues in IE 5/6 is available on ExploitDB. There is no evidence of active exploitation, and the vulnerability has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
26.91%
Probability of exploitation in next 30 days
EPSS Percentile
97.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-23465 · Dec 23, 2003
This CVE's current EPSS score of 0.2691 is in the 98th percentile among its peer group of 19,956 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2004/ms04-004
exchange.xforce.ibmcloud.com / vulnerabilities/13935
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A490
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A491
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A510
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A511
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A512
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A513
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A526
kb.cert.org / vuls/id/652278
Third Party AdvisoryUS Government Resource
securityfocus.com / archive/1/346948
Vendor Advisory
us-cert.gov / cas/techalerts/TA04-033A.html
US Government Resource
zapthedingbat.com / security/ex01/vun1.htm
ExploitVendor Advisory