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CVE-2011-4211

22
FAUCET Score

CVE-2011-4211 describes a critical vulnerability in the Google App Engine Python SDK prior to version 1.5.4, specifically within its sandbox environment's FakeFile implementation. This flaw allows local users to bypass access restrictions and create arbitrary files by manipulating ALLOWED_MODES and ALLOWED_DIRS parameters via the _ah/admin/interactive/execute endpoint. With a CVSS score of 7.2, this vulnerability is highly severe, indicating a local attack vector with low complexity, leading to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.5.3CPE matchmatch criteria
cpe:2.3:a:google:app_engine_python_sdk:*:*:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:google:app_engine_python_sdk:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:google:app_engine_python_sdk:1.0.2:*:*:*:*:*:*:*
1.1.0CPE matchmatch criteria
cpe:2.3:a:google:app_engine_python_sdk:1.1.0:*:*:*:*:*:*:*
1.1.1CPE matchmatch criteria
cpe:2.3:a:google:app_engine_python_sdk:1.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

AV:L/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 16th percentile among its peer group of 3,237 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.watchfire.com / files/googleappenginesdk.pdf
Exploit
code.google.com / p/googleappengine/wiki/SdkReleaseNotes
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/71064
securityfocus.com / bid/50464