How severe is CVE-2011-1894?

CVE-2011-1894 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-1894 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1894?

CVE-2011-1894 primarily affects Microsoft Windows 2003 Server. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1894?

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

When was CVE-2011-1894 published?

CVE-2011-1894 was published on 2011-06-16 and last updated on 2026-06-16.

CVE-2011-1894

CVE-2011-1894 is a medium-severity vulnerability in Microsoft Windows 2003 Server with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Windows 2003 Server
Published: 2011-06-16
Last modified: 2026-06-16

Description

The MHTML protocol handler in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly handle a MIME format in a request for embedded content in an HTML document, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted EMBED element in a web page that is visited in Internet Explorer, aka "MHTML Mime-Formatted Request Vulnerability."

Frequently asked questions

What is CVE-2011-1894?: The MHTML protocol handler in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly handle a MIME format in a request for embedded content in an HTML document, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted EMBED element in a web page that is visited in Internet Explorer, aka "MHTML Mime-Formatted Request Vulnerability."
How severe is CVE-2011-1894?: CVE-2011-1894 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-1894 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1894?: CVE-2011-1894 primarily affects Microsoft Windows 2003 Server. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1894?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1894 published?: CVE-2011-1894 was published on 2011-06-16 and last updated on 2026-06-16.

References

Affected products (16)

cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x32:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*

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