How severe is CVE-2011-2159?

CVE-2011-2159 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2011-2159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2159?

CVE-2011-2159 affects Smartertools Smarterstats. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-2159?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-2159 published?

CVE-2011-2159 was published on 2011-05-20 and last updated on 2026-06-16.

CVE-2011-2159

CVE-2011-2159 is a critical-severity vulnerability in Smartertools Smarterstats with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Smartertools Smarterstats
Published: 2011-05-20
Last modified: 2026-06-16

Description

The SmarterTools SmarterStats 6.0 web server omits the Content-Type header for certain resources, which might allow remote attackers to have an unspecified impact by leveraging an interpretation conflict involving (1) Admin/Defaults/frmDefaultSiteSettings.aspx, (2) Admin/Defaults/frmServerDefaults.aspx, (3) Admin/frmReportSettings.aspx, (4) Admin/frmSite.aspx, (5) App_Themes/Default/ButtonBarIcons.xml, (6) App_Themes/Default/Skin.xml, (7) Client/frmImportSettings.aspx, (8) Client/frmSeoSettings.aspx, (9) Services/Web.config, (10) aspnet_client/system_web/4_0_30319/, (11) clientaccesspolicy.xml, (12) cloudscan.exe, (13) crossdomain.xml, or (14) sitemap.xml. NOTE: it is possible that only clients, not the SmarterStats product, could be affected by this issue.

Frequently asked questions

What is CVE-2011-2159?: The SmarterTools SmarterStats 6.0 web server omits the Content-Type header for certain resources, which might allow remote attackers to have an unspecified impact by leveraging an interpretation conflict involving (1) Admin/Defaults/frmDefaultSiteSettings.aspx, (2) Admin/Defaults/frmServerDefaults.aspx, (3) Admin/frmReportSettings.aspx, (4) Admin/frmSite.aspx, (5) App_Themes/Default/ButtonBarIcons.xml, (6) App_Themes/Default/Skin.xml, (7) Client/frmImportSettings.aspx, (8) Client/frmSeoSettings.aspx, (9) Services/Web.config, (10) aspnet_client/system_web/4_0_30319/, (11) clientaccesspolicy.xml, (12) cloudscan.exe, (13) crossdomain.xml, or (14) sitemap.xml. NOTE: it is possible that only clients, not the SmarterStats product, could be affected by this issue.
How severe is CVE-2011-2159?: CVE-2011-2159 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-2159 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2159?: CVE-2011-2159 affects Smartertools Smarterstats. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-2159?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-2159 published?: CVE-2011-2159 was published on 2011-05-20 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:smartertools:smarterstats:6.0:*:*:*:*:*:*:*

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