Arbitrary File Deletion Vulnerability in SigmaForms Pro Plugin for WordPress
CVE-2026-78657

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Sigmaforms Pro – Ai Generated Forms
Vendor
CVE Published:
2 September 2026

What is CVE-2026-78657?

The SigmaForms Pro plugin for WordPress is susceptible to arbitrary file deletion due to weaknesses in file path validation within the delete_submission_files function. This vulnerability affects all versions up to 1.4.11, allowing unauthenticated attackers to exploit the system by submitting a malicious path through the form upload field. Once stored in the database, if an administrator deletes a submission record using the admin panel, it triggers the deletion of arbitrary files from the server. This could lead to severe consequences, including remote code execution, if critical files such as wp-config.php are removed.

Affected Version(s)

SigmaForms Pro – AI Generated Forms 0 <= 1.4.11

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://feedback.bdthemes.com/announcements

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Doan Dinh Van
Hieus
.