CVE-2026-15990
Received Received - Intake

Directory Traversal in Formidable Charts WordPress Plugin

Publication date: 2026-08-26

Last updated on: 2026-08-26

Assigner: Wordfence

Description
The Formidable Charts plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.0.1 via the 'frm_graph' parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. Successful exploitation requires Formidable Forms Lite, Formidable Forms Pro, and Formidable Charts to be active and requires the wp-content/uploads/frm-charts/ directory to exist, normally after an image-format chart is rendered.

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Meta Information

Published
2026-08-26
Last Modified
2026-08-26
Generated
2026-08-26
AI Q&A
2026-08-26
EPSS Evaluated
N/A
NVD
CVE-2026-15990
EUVD
EUVD-2026-66424

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
formidable charts to 2.0.1 (inc)
formidable forms_lite *
formidable forms_pro *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

This vulnerability is a Directory Traversal issue in the Formidable Charts WordPress plugin affecting versions up to 2.0.1. It allows unauthenticated attackers to read arbitrary files on the server by exploiting the 'frm_graph' parameter. Exploitation requires the Formidable Forms Lite, Formidable Forms Pro, and Formidable Charts plugins to be active and the wp-content/uploads/frm-charts/ directory to exist.

Detection Guidance

Check if the Formidable Charts plugin version is up to date. Inspect server logs for unusual requests targeting the 'frm_graph' parameter. Look for file read attempts in directories like wp-content/uploads/frm-charts/. Use WordPress security plugins to scan for vulnerable versions.

Impact Analysis

This vulnerability can allow attackers to access sensitive files on your server, potentially exposing confidential data such as configuration files, user credentials, or other sensitive information stored on the system.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements under GDPR and HIPAA. Organizations may face legal penalties, data breach notifications, and reputational damage if exploited.

Mitigation Strategies

Update the Formidable Charts plugin to version 2.0.2 or later immediately. Disable the plugin if not in use. Restrict file access permissions on the server. Monitor for suspicious activity in server logs.

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