CVE-2026-78657
Received Received - Intake

Arbitrary File Deletion in SigmaForms Pro WordPress Plugin

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Wordfence

Description
The SigmaForms Pro – AI Generated Forms plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the delete_submission_files function in all versions up to, and including, 1.4.11. This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). The malicious path traversal URL is submitted via form upload field and stored in the database, with deletion triggered when an administrator deletes the submission record from the admin panel.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-78657
EUVD
EUVD-2026-69872

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
sigmaforms pro to 1.4.11 (inc)

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

The SigmaForms Pro plugin for WordPress has a flaw in its file deletion function that allows unauthenticated attackers to delete arbitrary files on the server. This happens because the plugin does not properly validate file paths before deletion. Attackers can exploit this by submitting a malicious path traversal URL through a form upload field, which is stored in the database. When an administrator deletes a submission record, the malicious file deletion is triggered.

Detection Guidance

Check WordPress installations for the SigmaForms Pro plugin versions up to 1.4.11. Look for suspicious file deletions or unusual activity in server logs, particularly involving form upload fields or admin panel submissions.

Impact Analysis

This vulnerability can lead to severe consequences such as remote code execution if critical files like wp-config.php are deleted. Attackers could gain full control of the website, steal sensitive data, or disrupt services. Unauthenticated access means anyone on the internet could exploit this without needing credentials.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR and HIPAA requirements for protecting personal and health data. Unauthorized file deletion or code execution may result in unauthorized access to sensitive information, triggering legal penalties, fines, or mandatory breach notifications under these regulations.

Mitigation Strategies

Immediately update the SigmaForms Pro plugin to the latest version beyond 1.4.11. If an update is unavailable, consider disabling or removing the plugin entirely. Review server files for unauthorized deletions and restore any deleted critical files like wp-config.php.

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