Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in the SigmaForms Pro WordPress plugin allows unauthenticated attackers to delete arbitrary files on the server. This could potentially lead to remote code execution if critical files are targeted.
- Plugin flaw lets attackers delete any file.
- Critical flaw impacts public-facing sites.
- Confirm relevance and assess exposure.
Attack Path
How an attacker could exploit the issue
An unauthenticated attacker can trick a website visitor into uploading a specially crafted file through a form. This file's path is then stored in the site's database. When a site administrator later views or deletes this submission record, the vulnerability is triggered, allowing the attacker to delete arbitrary files on the server. This could lead to critical system files being removed, potentially enabling remote code execution.
- File upload through a form.
- Administrator deleting submission records.
- Arbitrary file deletion, potential RCE.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows unauthenticated attackers to delete arbitrary files on the server. When a form submission is deleted by an administrator, the plugin does not properly validate file paths, potentially leading to the deletion of critical system files. This could result in remote code execution if a crucial file, like the WordPress configuration file, is deleted.
- Arbitrary files on the server.
- Via malicious form uploads and admin deletion.
- Potential remote code execution.
Operational Fix
Recommended remediation, mitigation, and detection steps
Application owners and platform teams responsible for WordPress environments should address this vulnerability. The first step is to identify all instances of the SigmaForms Pro plugin, confirm whether they are accessible externally and critical to business operations, and then determine the accountable owner for remediation planning.
- WordPress application owners should own this.
- Verify plugin presence and external reachability.
- Plan remediation based on identified risk.
