CVE-2002-2427
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 · uneditedThe security handler in GoAhead WebServer before 2.1.1 allows remote attackers to bypass authentication and obtain access to protected web content via "an extra slash in a URL," a different vulnerability than CVE-2002-1603.
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 GoAhead WebServer before version 2.1.1 contains an authentication bypass vulnerability in its security handler. Attackers can bypass authentication and access protected web content by adding an extra slash in the URL, likely due to improper URL normalization before the authentication check.
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<= 2.1= 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
- 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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Identify GoAhead WebServer versionCheck the server banner, HTTP headers, or consult the binary/library file version. Common methods: curl -I http://target/ or inspect the webserver binary with 'strings' or file version info. Compare against affected versions: 2.0 and <=2.1.Affected if Installed version is 2.0 or any version 2.1 or lower (before 2.1.1)
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Confirm authentication is enabledReview GoAhead configuration files (goahead.conf or similar) for 'auth' or 'security' directives. Check if any URL prefixes or routes are marked as protected or require login.Affected if Authentication or authorization is configured for any web resource
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Verify protected content existsList the web content directories and identify any restricted pages or endpoints defined in the security configuration.Affected if There are web pages or resources configured to require authentication
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Test for URL normalization bypassAttempt to access a known-protected resource with an extra slash (e.g., http://target/admin//page or http://target/protected//resource). Compare the response to the normal protected URL without the extra slash.Affected if Access is granted with the extra slash when it would normally require authentication
You are affected if the installed GoAhead WebServer version is 2.0 or 2.1 (any version before 2.1.1), authentication is configured for any web content, and the extra-slash URL bypass grants unauthorized access to protected resources.
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 GoAhead WebServer to version 2.1.1 or later, which contains the patch for proper URL normalization in the security handler.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2002-2427 — 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-2002-2427 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
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