How severe is CVE-2011-1263?

CVE-2011-1263 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-1263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1263?

CVE-2011-1263 affects Microsoft Windows Server 2008. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-1263?

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

When was CVE-2011-1263 published?

CVE-2011-1263 was published on 2011-08-10 and last updated on 2026-06-16.

CVE-2011-1263

CVE-2011-1263 is a medium-severity vulnerability in Microsoft Windows Server 2008 with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 15% places it in the 96th 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: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Windows Server 2008
Published: 2011-08-10
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in the logon page in Remote Desktop Web Access (RD Web Access) in Microsoft Windows Server 2008 R2 and R2 SP1 allows remote attackers to inject arbitrary web script or HTML via the URI, aka "Remote Desktop Web Access Vulnerability."

Frequently asked questions

What is CVE-2011-1263?: Cross-site scripting (XSS) vulnerability in the logon page in Remote Desktop Web Access (RD Web Access) in Microsoft Windows Server 2008 R2 and R2 SP1 allows remote attackers to inject arbitrary web script or HTML via the URI, aka "Remote Desktop Web Access Vulnerability."
How severe is CVE-2011-1263?: CVE-2011-1263 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-1263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1263?: CVE-2011-1263 affects Microsoft Windows Server 2008. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1263 published?: CVE-2011-1263 was published on 2011-08-10 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:*

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