CVE-2023-39776
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 · uneditedA File Upload vulnerability in PHPJabbers Ticket Support Script v3.2 allows attackers to execute arbitrary code via uploading a crafted file.
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 confidenceA critical file upload vulnerability in PHPJabbers Ticket Support Script v3.2 allows unauthenticated attackers to upload malicious files (likely PHP webshells) and achieve arbitrary code execution on the server. The application fails to properly validate uploaded file types, contents, or extensions before storing them in a web-accessible location.
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= 3.2CVSS 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 PHPJabbers Ticket Support Script installationLocate the application files and check for version identifiers in the source code, configuration files, or the admin panel about/version pageAffected if The installed version is exactly 3.2
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Locate the file upload functionalitySearch the application for upload-related scripts, forms, or endpoints - typically found in ticket creation or support request modulesAffected if The upload feature is present and accessible to unauthenticated users
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Verify upload directory is web-accessibleCheck the web server configuration and application structure to determine if the designated upload directory is located within the web root and accessible via HTTPAffected if The upload directory is inside the webroot and directly accessible over the web
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Inspect file validation logicExamine the upload handling code (typically in PHP files handling form submissions) to check if it validates file types, checks magic bytes, or uses whitelist filtering before saving filesAffected if No server-side validation exists, or only client-side/extension-based validation is performed, allowing PHP or other executable files to be uploaded
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Test upload capability with a benign fileIf permitted in your environment, attempt to upload a non-executable file through the ticket support form to confirm the upload feature is functionalAffected if The upload feature accepts and stores files without proper restrictions
You are affected if the PHPJabbers Ticket Support Script version 3.2 is installed and the unauthenticated file upload functionality is exposed without proper server-side validation, allowing executable files to be stored in a web-accessible location.
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 strict whitelist-based file validation (verify magic bytes, not just extensions), store uploads outside the webroot or disable script execution in the upload directory, and add proper authentication/authorization checks to the upload functionality.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39776 — 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-2023-39776 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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