CVE-2023-32637
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 · uneditedGBrowse accepts files with any formats uploaded and places them in the area accessible through unauthenticated web requests. Therefore, anyone who can upload files through the product may execute arbitrary code on the server.
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 confidenceGBrowse has an unrestricted file upload vulnerability that allows unauthenticated attackers to upload files of any format to a web-accessible directory, enabling arbitrary code execution on the server.
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 dataall versionsCVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 if GBrowse is exposedScan your network for web services running GBrowse (typically on ports 80/443, often at /gbrowse or /gbrowse2 paths). Check for GBrowse login pages or the GBrowse banner in HTTP responses.Affected if GBrowse is accessible over the network and responds to requests.
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Verify upload functionality authenticationAttempt to access the file upload endpoint without providing credentials. Check if the upload form or API accepts requests from unauthenticated sources.Affected if The upload functionality allows file uploads without requiring authentication.
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Inspect upload directory locationLocate the configured upload directory in GBrowse configuration and verify whether it falls within the web server's document root or is accessible via URL paths.Affected if Uploaded files are stored in directories that the web server serves directly.
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Test file type restrictionsUpload files with executable extensions (.php, .pl, .py, .sh, .exe) or double extensions (.php.txt) to the upload endpoint and check if they are accepted and stored.Affected if GBrowse accepts and stores files with potentially executable extensions without validation.
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Confirm upload directory is web-readableAfter uploading a test file, attempt to access it via a web browser using its URL to verify it can be served by the web server.Affected if Uploaded files are accessible via HTTP and can be executed or downloaded by attackers.
Your environment is affected if GBrowse is exposed and its file upload feature permits unauthenticated users to place files with arbitrary extensions into web-accessible directories.
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 authentication for file upload functionality, add strict file type validation with allowlist, and store uploaded files outside web-accessible directories.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 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 $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-32637 — 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-2023-32637 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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