How severe is CVE-2011-4211?

CVE-2011-4211 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2011-4211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4211?

CVE-2011-4211 primarily affects Google App Engine Python Sdk. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4211?

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

When was CVE-2011-4211 published?

CVE-2011-4211 was published on 2011-10-30 and last updated on 2026-06-16.

CVE-2011-4211

CVE-2011-4211 is a high-severity vulnerability in Google App Engine Python Sdk with a CVSS 2.0 base score of 7.2. 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-264.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Google App Engine Python Sdk
Published: 2011-10-30
Last modified: 2026-06-16

Description

The FakeFile implementation in the sandbox environment in the Google App Engine Python SDK before 1.5.4 does not properly control the opening of files, which allows local users to bypass intended access restrictions and create arbitrary files via ALLOWED_MODES and ALLOWED_DIRS changes within the code parameter to _ah/admin/interactive/execute, a different vulnerability than CVE-2011-1364.

Frequently asked questions

What is CVE-2011-4211?: The FakeFile implementation in the sandbox environment in the Google App Engine Python SDK before 1.5.4 does not properly control the opening of files, which allows local users to bypass intended access restrictions and create arbitrary files via ALLOWED_MODES and ALLOWED_DIRS changes within the code parameter to _ah/admin/interactive/execute, a different vulnerability than CVE-2011-1364.
How severe is CVE-2011-4211?: CVE-2011-4211 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2011-4211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4211?: CVE-2011-4211 primarily affects Google App Engine Python Sdk. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4211?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-4211 published?: CVE-2011-4211 was published on 2011-10-30 and last updated on 2026-06-16.

References

Affected products (37)

cpe:2.3:a:google:app_engine_python_sdk:*:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.7:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.8:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.1.9:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.2.7:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.4:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.5:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.6:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.7:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.3.8:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:google:app_engine_python_sdk:1.5.2:*:*:*:*:*:*:*

More vulnerabilities in Google App Engine Python Sdk

CVE-2011-4213 — High (CVSS 7.2): The sandbox environment in the Google App Engine Python SDK before 1.5.4 does not properly prevent use of the os…
CVE-2011-4212 — High (CVSS 7.2): The sandbox environment in the Google App Engine Python SDK before 1.5.4 does not properly prevent os.popen calls,…
CVE-2011-1364 — Medium (CVSS 6.8): Cross-site request forgery (CSRF) vulnerability in _ah/admin/interactive/execute (aka the Interactive Console) in the…

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