CVE-2026-13158
Received Received - Intake

Arbitrary File Upload in Everest Toolkit WordPress Plugin

Publication date: 2026-08-01

Last updated on: 2026-08-01

Assigner: WPScan

Description
The Everest Toolkit WordPress plugin through 1.2.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site administrators on multisite) to upload executable PHP files to the uploads directory.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-01
Last Modified
2026-08-01
Generated
2026-08-01
AI Q&A
2026-08-01
EPSS Evaluated
N/A
NVD
CVE-2026-13158
EUVD
EUVD-2026-51714

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
everest_toolkit everest_toolkit 1.2.3

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

The Everest Toolkit WordPress plugin through version 1.2.3 allows high-privilege users like Administrators to upload executable PHP files to the uploads directory. This happens because the plugin does not validate file types during demo-content import, bypassing WordPress's built-in file-type checks.

Detection Guidance

Check the uploads directory for unexpected PHP files. Look for files with .php extensions in wp-content/uploads. Review recent file uploads by administrators or users with high privileges. Verify if the Everest Toolkit plugin version is 1.2.3 or lower.

Impact Analysis

An attacker with Administrator access could upload malicious PHP files, potentially gaining control over the website. This could lead to full site compromise, data theft, or further attacks on visitors or connected systems.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR and HIPAA requirements for data protection and access controls. Non-compliance may result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Update the Everest Toolkit plugin to the latest version. Disable file uploads for non-administrative users. Implement file-type validation for all uploads. Monitor the uploads directory for unauthorized PHP files. Consider using a security plugin to block PHP execution in the uploads directory.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-13158. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart