How severe is CVE-2000-0503?

CVE-2000-0503 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-2000-0503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0503?

CVE-2000-0503 primarily affects Microsoft Internet Explorer. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2000-0503 published?

CVE-2000-0503 was published on 2000-06-06 and last updated on 2026-06-16.

CVE-2000-0503

CVE-2000-0503 is a low-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Explorer
Published: 2000-06-06
Last modified: 2026-06-16

Description

The IFRAME of the WebBrowser control in Internet Explorer 5.01 allows a remote attacker to violate the cross frame security policy via the NavigateComplete2 event.

Frequently asked questions

What is CVE-2000-0503?: The IFRAME of the WebBrowser control in Internet Explorer 5.01 allows a remote attacker to violate the cross frame security policy via the NavigateComplete2 event.
How severe is CVE-2000-0503?: CVE-2000-0503 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2000-0503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0503?: CVE-2000-0503 primarily affects Microsoft Internet Explorer. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0503 published?: CVE-2000-0503 was published on 2000-06-06 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.01:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.5:preview:*:*:*:*:*:*

More vulnerabilities in Microsoft Internet Explorer

CVE-2014-1764 — Critical (CVSS 10.0): Microsoft Internet Explorer 7 through 11 allows remote attackers to execute arbitrary code and bypass a sandbox…
CVE-2014-1763 — Critical (CVSS 10.0): Use-after-free vulnerability in Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary…
CVE-2010-1118 — Critical (CVSS 10.0): Unspecified vulnerability in Internet Explorer 8 on Microsoft Windows 7 allows remote attackers to execute arbitrary…
CVE-2009-1918 — Critical (CVSS 10.0): Microsoft Internet Explorer 5.01 SP4 and 6 SP1; Internet Explorer 6 for Windows XP SP2 and SP3 and Server 2003 SP2; and…
CVE-2009-1043 — Critical (CVSS 10.0): Unspecified vulnerability in Microsoft Internet Explorer 8 on Windows 7 allows remote attackers to execute arbitrary…
CVE-2007-3341 — Critical (CVSS 10.0): Unspecified vulnerability in the FTP implementation in Microsoft Internet Explorer allows remote attackers to "see a…

All CVEs affecting Microsoft Internet Explorer →