How severe is CVE-2011-0447?

CVE-2011-0447 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-0447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0447?

CVE-2011-0447 primarily affects Rubyonrails Rails. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0447?

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

When was CVE-2011-0447 published?

CVE-2011-0447 was published on 2011-02-14 and last updated on 2026-06-16.

CVE-2011-0447

CVE-2011-0447 is a medium-severity vulnerability in Rubyonrails Rails with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Rubyonrails Rails
Published: 2011-02-14
Last modified: 2026-06-16

Description

Ruby on Rails 2.1.x, 2.2.x, and 2.3.x before 2.3.11, and 3.x before 3.0.4, does not properly validate HTTP requests that contain an X-Requested-With header, which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks via forged (1) AJAX or (2) API requests that leverage "combinations of browser plugins and HTTP redirects," a related issue to CVE-2011-0696.

Frequently asked questions

What is CVE-2011-0447?: Ruby on Rails 2.1.x, 2.2.x, and 2.3.x before 2.3.11, and 3.x before 3.0.4, does not properly validate HTTP requests that contain an X-Requested-With header, which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks via forged (1) AJAX or (2) API requests that leverage "combinations of browser plugins and HTTP redirects," a related issue to CVE-2011-0696.
How severe is CVE-2011-0447?: CVE-2011-0447 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2011-0447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0447?: CVE-2011-0447 primarily affects Rubyonrails Rails. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0447 published?: CVE-2011-0447 was published on 2011-02-14 and last updated on 2026-06-16.

References

Affected products (24)

cpe:2.3:a:rubyonrails:rails:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.3.2:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.3.3:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.3.4:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.3.9:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.3.10:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:beta:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:rc:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.1:pre:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.2:pre:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:3.0.4:rc1:*:*:*:*:*:*

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