CVE-2026-7733
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 flaw has been found in funadmin up to 7.1.0-rc6. This affects the function UploadService::chunkUpload of the file app/common/service/UploadService.php of the component Frontend Chunked Upload Endpoint. This manipulation of the argument File causes unrestricted upload. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: 59. To fix this issue, it is recommended to deploy a patch.
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 exists in funadmin's UploadService::chunkUpload function within app/common/service/UploadService.php. The function fails to properly validate the File argument during chunked uploads, allowing remote attackers to upload arbitrary file types including malicious executables.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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 funadmin installation and versionLocate the funadmin installation directory and find version information (commonly in a version file, composer.json, or system info page)Affected if Running a funadmin version where the chunkUpload function lacks proper file validation
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Locate the UploadService.php fileFind app/common/service/UploadService.php in the funadmin installation directory and verify the chunkUpload function existsAffected if The chunkUpload function is present in the codebase
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Check if upload functionality is enabledReview application configuration files (commonly config files or admin settings) to determine if file upload features are enabled for usersAffected if Upload functionality is enabled and accessible to users
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Verify chunked upload endpoint accessibilityIdentify the API endpoint for chunked uploads (typically /upload/chunk or similar path) and confirm it responds without authentication restrictionsAffected if The chunked upload endpoint is accessible without proper access controls
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Examine chunkUpload validation logicOpen app/common/service/UploadService.php and inspect the chunkUpload function for file type, extension, or content validation checksAffected if The chunkUpload function lacks or has inadequate validation for uploaded file types and extensions
You are affected if funadmin is installed with a version lacking proper file validation in the chunkUpload function and the chunked upload feature is enabled and accessible
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 dataDeploy patch 59 immediately to add proper file type, extension, and content validation to the chunkUpload function. Until patch deployment, disable the frontend chunked upload endpoint or restrict upload permissions.
- 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.
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Free · runs locallyCheck whether your project pulls in CVE-2026-7733 — 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-2026-7733 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