CVE-2020-12800

Drag and Drop Multiple File Upload - Contact Form 7 <= 1.3.3.2 - Arbitrary File Upload

2020-06-04 00:00
h00die

Strategic Overview

Status
Patched in 1.3.3.3
Affected Plugin
Drag and Drop Multiple File Upload for Contact Form 7
Affected Version
<= 1.3.3.2
CVSS
9.8Critical
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2020-12800
View all Drag and Drop Multiple File Upload for Contact Form 7 vulnerabilities

At a glance

CVE-2020-12800 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Drag and Drop Multiple File Upload for Contact Form 7 WordPress plugin, affecting versions <= 1.3.3.2. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.3.3.3; sites on affected versions should update now. Disclosed June 2020, reported by h00die.

Vulnerability Overview

The drag-and-drop-multiple-file-upload-contact-form-7 plugin before 1.3.3.3 for WordPress allows Unrestricted File Upload and remote code execution by setting supported_type to php% and uploading a .php% file.

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, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Reaching this weakness in Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.3.2 takes a caller who can reach the endpoint. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Drag and Drop Multiple File Upload for Contact Form 7 the fix is 1.3.3.3: builds <= 1.3.3.2 are affected, anything from 1.3.3.3 onward is not.

Remediation

Update to version 1.3.3.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Drag and Drop Multiple File Upload for Contact Form 7: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Drag and Drop Multiple File Upload for Contact Form 7 1.3.3.3 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-12800https://www.wordfence.com/threat-intel/vulnerabilities/id/023910d0-c2eb-41cd-9d42-606c4cbb8059https://nvd.nist.gov/vuln/detail/CVE-2020-12800

Related records

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