CVE-2011-3837
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedDirectory traversal vulnerability in blog_system/data_functions.php in Wuzly 2.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the preview parameter to index.php.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceDirectory traversal vulnerability in Wuzly 2.0's blog_system/data_functions.php allows remote attackers to read arbitrary files by using '..' sequences in the preview parameter passed to index.php. The lack of input validation on the preview parameter enables attackers to escape the intended directory and access sensitive system files.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- M
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Wuzly 2.0 installationIdentify if Wuzly CMS version 2.0 is installed on the server by checking for characteristic Wuzly files or headers, or by querying the web application for version information if exposed.Affected if Wuzly version 2.0 is confirmed to be installed
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Verify vulnerable file existsCheck if the file blog_system/data_functions.php exists within the web application's directory structure.Affected if The file blog_system/data_functions.php exists on the system
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Confirm blog_system module is accessibleAttempt to access the blog_system functionality through the web server to determine if the module is enabled and reachable.Affected if The blog_system module is enabled and accessible via index.php
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Inspect preview parameter handling in index.phpLocate index.php in the Wuzly installation and examine how the preview parameter is processed, specifically looking for lack of input validation on the preview parameter.Affected if index.php accepts a preview parameter without proper input validation or sanitization of path traversal sequences
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Check for path traversal protectionAnalyze the data_functions.php file to verify whether the preview parameter properly validates and sanitizes input to reject or handle '..' sequences.Affected if The code does not validate or sanitize '..' sequences in the preview parameter, allowing directory traversal
A user is affected if Wuzly 2.0 is installed with the blog_system module enabled and the preview parameter in index.php lacks input validation for path traversal sequences.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement strict input validation on the preview parameter to reject or sanitize path traversal sequences ('..'), use whitelisting for allowed file paths, and consider employing PHP's realpath() to validate that resolved paths fall within expected directories.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,512.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-3837 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2011-3837 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data