CVE-2023-46263
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 · uneditedAn unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 and below that could allow an attacker to achieve a remote code execution.
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 confidenceAn unrestricted file upload vulnerability in Avalanche versions 6.4.1 and below allows attackers to upload files with dangerous types (such as executable scripts) to the server, potentially leading to remote code execution.
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< 6.4.2CVSS 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 the installed Ivanti Avalanche versionCheck the Avalanche server's version number through the administration console or by inspecting the application binaries/package metadata. This is typically found in the About section of the admin interface or in the installation directory's version file.Affected if The installed version is 6.4.1 or below (any version < 6.4.2)
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Locate the file upload functionalityIdentify whether the Avalanche web interface or API exposes file upload endpoints. Common paths include /upload, /fileupload, or similar endpoints used for device configuration, app deployment, or asset management.Affected if File upload endpoints are accessible without additional security controls
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Check upload directory accessibilityExamine the server configuration to determine where uploaded files are stored. Verify if the upload directory is located within the web root and if the web server allows script execution (e.g., .asp, .jsp, .php, .exe files) in that directory.Affected if Uploaded files are stored in a web-accessible directory and script execution is not disabled
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Verify file type validation controlsReview the application's configuration or code to determine if there is strict allowlist-based file type validation before saving uploaded files. Check if dangerous extensions like .exe, .asp, .jsp, .php, .bat, or .cmd are blocked.Affected if No allowlist-based file type validation exists or dangerous file types are not explicitly blocked
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Confirm authentication on upload endpointsTest or review the upload functionality to verify that proper authentication and authorization are required. Ensure anonymous or unauthenticated users cannot access or use the file upload feature.Affected if File upload endpoints are accessible to unauthenticated or unauthorized users
Your environment is affected if Ivanti Avalanche version is below 6.4.2 AND the file upload feature is accessible and lacks proper file type validation, web root isolation, or authentication controls.
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.
dbcve · scoped6.4.2
Upgrade to a version above 6.4.1 if available. If no patch exists, implement strict allowlist-based file type validation, store uploads outside the web root, disable script execution in upload directories, and add proper authentication/authorization controls.
Avalanche 6.4.2
- Obtain Avalanche version 6.4.2 from the official source at download.wavelink.com
- Backup the current Avalanche installation and configuration data
- Install or upgrade to Avalanche version 6.4.2 following the standard upgrade procedure
- Verify the installation was successful and the web interface is accessible
- Confirm the vulnerability is remediated by verifying file upload restrictions are properly enforced
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation8.0 h
- Testing5.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,328.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-46263 — 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-2023-46263 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