CVE-2019-25296

WP Cost Estimation <= 9.642 - Missing Authorization to Arbitrary File Upload/Delete

2019-02-14 00:00
Mikey Veenstra

Strategic Overview

Status
Patched in 9.644
Affected Plugin
WP Cost Estimation & Payment Forms Builder
Affected Version
< 9.644
CVSS
9.8Critical
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2019-25296
View all WP Cost Estimation & Payment Forms Builder vulnerabilities

At a glance

CVE-2019-25296 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the WP Cost Estimation & Payment Forms Builder WordPress plugin, affecting versions < 9.644. 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 9.644; sites on affected versions should update now. Disclosed February 2019, reported by Mikey Veenstra.

Vulnerability Overview

The WP Cost Estimation plugin for WordPress is vulnerable to arbitrary file uploads and deletion due to missing file type validation in the lfb_upload_form and lfb_removeFile AJAX actions in versions up to, and including, 9.642. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected sites server which may make remote code execution possible. Additionally, the attacker can also delete files on the server such as database configuration files, subsequently uploading their own database files.

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 WP Cost Estimation & Payment Forms Builder < 9.644 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 WP Cost Estimation & Payment Forms Builder the fix is 9.644: builds < 9.644 are affected, anything from 9.644 onward is not.

Remediation

Update to version 9.644, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WP Cost Estimation & Payment Forms Builder: 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: WP Cost Estimation & Payment Forms Builder 9.644 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2019-25296https://www.wordfence.com/threat-intel/vulnerabilities/id/ae50aa5d-95e3-4650-9dbf-118b4ba3abdahttps://nvd.nist.gov/vuln/detail/CVE-2019-25296

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C