CVE-2026-13369

Ninja Forms - File Uploads <= 3.3.29 - Unauthenticated Arbitrary File Read via File Upload Field 'files[].data.file_path' Parameter

2026-07-01 20:41
daroo

Strategic Overview

Status
Patched in 3.3.30
Affected Plugin
Ninja Forms - File Uploads
Affected Version
<= 3.3.29
CVSS
7.5High
Weakness type
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE
CVE-2026-13369
View all Ninja Forms - File Uploads vulnerabilities

At a glance

CVE-2026-13369 is a high-severity Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in the Ninja Forms - File Uploads WordPress plugin, affecting versions <= 3.3.29. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 3.3.30; sites on affected versions should update now. Disclosed July 2026, reported by daroo.

Vulnerability Overview

The Ninja Forms - File Uploads plugin for WordPress is vulnerable to Arbitrary File Read via the attach_files() function in versions up to, and including, 3.3.29. This is due to the get_files_for_attachment() function accepting a raw attacker-controlled 'files' array when the process() method returns early due to a client-supplied saveProgress flag, bypassing all upload validation, path normalization, and database record creation steps, and allowing an attacker-supplied file_path value to reach wp_mail() as an email attachment with only a file_exists() check. This makes it possible for unauthenticated attackers to read arbitrary files on the affected site's server.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Ninja Forms - File Uploads <= 3.3.29 carries this weakness at files, and reaching it takes no account at all. Path traversal happens when user-controlled text is used to build a filesystem path without being constrained to an intended directory, so sequences like ../ walk the resolved path somewhere else.

Depending on the operation, it means reading files outside the intended folder — wp-config.php being the usual target — or writing to and deleting paths the web server can touch. For Ninja Forms - File Uploads the fix is 3.3.30: builds <= 3.3.29 are affected, anything from 3.3.30 onward is not.

Remediation

Update to version 3.3.30, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Ninja Forms - File Uploads 3.3.30 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-13369https://www.wordfence.com/threat-intel/vulnerabilities/id/87d4dd4a-b1e2-4d08-aef1-77e58aa7531dhttps://nvd.nist.gov/vuln/detail/CVE-2026-13369

Related records

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