CVE-2011-3816
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 · uneditedWEBinsta mailing list manager 1.3e allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by install/install3.php and certain other files.
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 · moderate confidenceWEBinsta mailing list manager 1.3e contains multiple PHP files that, when accessed directly without proper context, cause the PHP interpreter to generate verbose error messages revealing the full server filesystem installation path. Attackers can exploit this by directly requesting files like install/install3.php to gather path information for use in further attacks.
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= 1.3eCVSS 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
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- None
- Availability
- None
AV:N/AC:L/Au:N/C:P/I:N/A:N
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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Verify Webinsta Mailing List Manager installationLook for the application by checking for directories containing 'webinsta' or 'mailing' in the web root, or search for characteristic files like 'index.php', 'config.php', or the 'install' directory.Affected if The application directory for Webinsta Mailing List Manager 1.3e exists on the server.
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Confirm installed versionCheck version.php, README, or any version identifier file within the Webinsta installation directory.Affected if The installed version is exactly 1.3e.
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Check PHP error display configurationReview php.ini for 'display_errors = On' or check if error_reporting is set to E_ALL in php.ini, .htaccess, or application config files.Affected if display_errors is enabled or error reporting is set to expose all errors.
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Test vulnerable file for path disclosureSend an HTTP request directly to install/install3.php without proper context (no session, no POST data) and examine any error messages returned.Affected if The response contains the full server filesystem path (for example, /var/www/html or C:\inetpub\wwwroot).
A user is affected if Webinsta Mailing List Manager 1.3e is installed, PHP display_errors is enabled, and directly accessing install/install3.php reveals the full server path in an error message.
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 dataDisable display_errors in PHP configuration and implement custom error handlers to prevent detailed error messages from being exposed to end users in production environments.
- Consultation2.0 h
- Implementation3.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,032.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-3816 — 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-2011-3816 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