Unrestricted File UploadWeakness · CWE-434

CVE-2026-24729

CRITICAL · 10.0 CVSS v4.0 Published 2026-01-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
An unrestricted upload of file with dangerous type vulnerability in the file upload function of Interinfo DreamMaker versions before 2025/10/22 allows remote attackers to execute arbitrary system commands via a malicious class 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 · high confidence

Interinfo DreamMaker suffers from an unrestricted file upload vulnerability in its file upload function. Attackers can upload malicious Java class files (.class) which, when accessed, allow arbitrary system command execution. The lack of proper file type validation and sanitization enables remote code execution.

MitigationImplement strict allowlist-based file type validation (both by extension and MIME type), verify file content/signatures, store uploads outside webroot, and disable script execution in upload directories.

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
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Interinfo DreamMaker installation
    Locate DreamMaker installation directory - check common paths like /var/www/html/, C:\inetpub\, or application-specific directories. Look for DreamMaker executable or configuration files.
    Affected if DreamMaker is present and the file upload feature is in use
  2. Identify file upload functionality
    Examine DreamMaker's web interface or configuration for file upload endpoints. Look for forms, APIs, or modules that handle file uploads.
    Affected if A file upload feature exists and is accessible to users
  3. Check file type validation configuration
    Inspect DreamMaker's configuration files, upload handlers, or security settings. Look for allowlist/denylist configurations for permitted file extensions.
    Affected if No file type validation exists or .class files are explicitly allowed in the upload configuration
  4. Verify upload directory location
    Locate the configured upload directory in DreamMaker's settings. Check if uploads are stored within the webroot or in a directory accessible via HTTP/HTTPS.
    Affected if Upload directory is within the webroot and serves files via the web server
  5. Test for unrestricted .class upload
    Attempt to upload a .class file through the upload feature, or inspect network requests to see if .class extensions are accepted without blocking.
    Affected if The system accepts .class file uploads without rejection or sanitization

If Interinfo DreamMaker is running with an exposed, unrestricted file upload function that accepts .class files into a web-accessible directory, the environment is vulnerable to remote code execution via CVE-2026-24729.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict allowlist-based file type validation (both by extension and MIME type), verify file content/signatures, store uploads outside webroot, and disable script execution in upload directories.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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Scan for this in your stack

Free · runs locally
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-24729 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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