CVE-2015-3257
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 · uneditedZend/Diactoros/Uri::filterPath in zend-diactoros before 1.0.4 does not properly sanitize path input, which allows remote attackers to perform cross-site scripting (XSS) or open redirect attacks.
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 confidenceThe Zend/Diactoros Uri::filterPath method in versions before 1.0.4 fails to properly sanitize path input, allowing attackers to inject malicious characters that can enable cross-site scripting (XSS) attacks or open redirects through crafted URIs.
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<= 1.0.3CVSS 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
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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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Confirm Zend Diactoros is installedCheck your project's composer.json for 'zendframework/zend-diactoros' in the require section, or list the vendor directory for the zend-diactoros package folderAffected if The zendframework/zend-diactoros package exists in your project dependencies
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Determine the installed Diactoros versionRun 'composer show zendframework/zend-diactoros' to see the installed version number, or check the version specified in your composer.lock file under the diactoros package entryAffected if The installed version is 1.0.3 or earlier (versions before 1.0.4 are vulnerable)
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Identify if Uri class from Diactoros is usedSearch your codebase for 'use Zend\Diactoros\Uri' or 'new Uri' statements, and check if your application creates URI objects from user-supplied pathsAffected if Your application imports or instantiates the Uri class from zend-diactoros to handle URL paths
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Check if path input reaches filterPath methodReview code that passes URL path data to Uri objects; examine whether request path, route parameters, or query string values flow into the Uri::filterPath method without additional sanitizationAffected if User-controlled or external path data is passed directly to Uri objects without prior sanitization
Your environment is affected if you have zend-diactoros version 1.0.3 or earlier installed AND your application uses the Uri class with path input that could be manipulated by an attacker.
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 dataUpgrade zend-diactoros to version 1.0.4 or later which includes proper path sanitization, and validate all URI path inputs if immediate upgrade is not feasible.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 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 $2,464.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-3257 — 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-2015-3257 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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- Version or environment caveats, and links to real fixes
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