dbcve.org
Jquery Upload FileFramework / library · Hayageek

CVE-2021-37504

MEDIUM · 6.1 CVSS v3.1 Published 2022-02-25
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

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
A cross-site scripting (XSS) vulnerability in the fileNameStr parameter of jQuery-Upload-File v4.0.11 allows attackers to execute arbitrary web scripts or HTML via a crafted file with a Javascript payload in the file name.

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

Cross-site scripting (XSS) vulnerability in jQuery-Upload-File v4.0.11 where the fileNameStr parameter fails to sanitize filenames containing JavaScript payloads, allowing arbitrary script execution when filenames are displayed to users.

MitigationImplement strict input validation and output encoding for the fileNameStr parameter to reject or sanitize special characters (including <, >, ', ", and JavaScript keywords) in filenames before processing or displaying them.

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
Jquery Upload FileFramework / library
Affected:= 4.0.11

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
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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. Identify jQuery-Upload-File version
    Check the version number in the jquery.uploadfile.js file header comment, package.json, or the minified file for the version string '4.0.11'
    Affected if The installed version is exactly 4.0.11
  2. Locate fileNameStr parameter handling
    Search the application codebase for 'fileNameStr' in the jQuery-Upload-File plugin file (jquery.uploadfile.js) and any custom handlers that process this parameter
    Affected if The application processes filenames through the fileNameStr parameter from the plugin
  3. Check for filename display in UI
    Inspect the web application frontend code to find where uploaded filenames are rendered in HTML elements such as tables, lists, or file status displays
    Affected if The application displays uploaded filenames directly to users without output encoding
  4. Verify input sanitization is absent
    Review the code that handles fileNameStr - look for sanitization functions, input validation, or output encoding (such as HTML escaping) applied to filenames before they are inserted into the DOM
    Affected if No sanitization or encoding is applied to filenames before they are displayed to users

If the environment uses jQuery-Upload-File version 4.0.11 and displays uploaded filenames to users without sanitization or output encoding, it is affected by CVE-2021-37504.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict input validation and output encoding for the fileNameStr parameter to reject or sanitize special characters (including <, >, ', ", and JavaScript keywords) in filenames before processing or displaying them.

Recommended fix Moderate confidence

jQuery-Upload-File version 4.0.12 or later

  1. 1. Identify all instances of jQuery-Upload-File version 4.0.11 in your codebase and dependencies
  2. 2. Locate the package.json, bower.json, or other dependency management files that reference jquery-upload-file
  3. 3. Update the version constraint for jquery-upload-file to ^4.0.12 or the latest stable version
  4. 4. Run 'npm update' or 'bower update' to fetch the new version
  5. 5. Verify the update was successful by checking the installed version
  6. 6. Test the file upload functionality to ensure the XSS fix works and doesn't break existing features
  7. 7. Rebuild and redeploy any applications using this library
Caveat Minor version upgrade; unlikely to introduce breaking changes, but regression test file upload functionality

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Jquery Upload File Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-37504 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2021-37504 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data