Executive Intelligence Brief

The Database for Contact Form 7, WPforms, Elementor forms plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation. This vulnerability, tracked as CVE-2026-9843, has a CVSS score of 8.1 and affects all versions up to 1.5.1. An unauthenticated attacker can exploit this vulnerability to delete arbitrary files on the server, which can easily lead to remote code execution when a critical file is deleted. Successful exploitation requires an administrator to view or edit the poisoned form entry.

The vulnerability is caused by insufficient file path validation in the view_page function. An attacker can craft a JSON key that bypasses the stored-path isset check and triggers the deletion of a traversal-specified file. This can be done by sending a specially crafted request to the view_page function, which can be triggered when an administrator views or edits the poisoned form entry.

The impact of this vulnerability is high, as it can lead to remote code execution, denial of service, and data loss. The vulnerability has not been actively exploited yet, but it is expected that threat actors will exploit it soon.

The recommended solution is to upgrade to a patched version of the plugin. The vendor has released a patch for this vulnerability, and users are advised to update to the latest version as soon as possible.

Threat Overview

The Database for Contact Form 7, WPforms, Elementor forms plugin is a popular WordPress plugin used to create and manage contact forms. The plugin is vulnerable to arbitrary file deletion due to insufficient file path validation in the view_page function. This vulnerability affects all versions up to 1.5.1.

The vulnerability is caused by the plugin's failure to properly validate file paths, allowing an attacker to delete arbitrary files on the server. This can be done by sending a specially crafted request to the view_page function, which can be triggered when an administrator views or edits the poisoned form entry.

The impact of this vulnerability is high, as it can lead to remote code execution, denial of service, and data loss. The vulnerability has not been actively exploited yet, but it is expected that threat actors will exploit it soon.

Technical Deep Dive

Vulnerability Classification

The vulnerability is classified as CWE-22, which is a vulnerability that allows an attacker to access or manipulate files outside the intended directory.

The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H, which indicates that the vulnerability has a high impact and is easily exploitable.

Root Cause Analysis

The root cause of this vulnerability is the insufficient file path validation in the view_page function. The plugin fails to properly validate file paths, allowing an attacker to delete arbitrary files on the server.

The vulnerability is caused by the plugin's use of a vulnerable JSON parsing library, which allows an attacker to craft a JSON key that bypasses the stored-path isset check and triggers the deletion of a traversal-specified file.

Attack Vector & Chain

The attack vector for this vulnerability is a specially crafted request to the view_page function, which can be triggered when an administrator views or edits the poisoned form entry.

The attack chain for this vulnerability involves the following steps:

  • An attacker crafts a specially crafted request to the view_page function.
  • The request is sent to the server, which triggers the vulnerability.
  • The vulnerability allows the attacker to delete arbitrary files on the server.

Exploitation Scenario Walkthrough

Scenario: Arbitrary File Deletion via Malicious Form Entry

Reconnaissance: An attacker discovers a vulnerable version of the Database for Contact Form 7, WPforms, Elementor forms plugin on a WordPress site.

Weaponization: The attacker crafts a specially crafted request to the view_page function, which includes a malicious JSON key that bypasses the stored-path isset check and triggers the deletion of a traversal-specified file.

Delivery & Exploitation: The attacker sends the specially crafted request to the server, which triggers the vulnerability. The vulnerability allows the attacker to delete arbitrary files on the server.

Post-Exploitation: The attacker can use the vulnerability to delete critical files on the server, potentially leading to remote code execution.

Impact Realization: The vulnerability can lead to remote code execution, denial of service, and data loss.

Exploitation in the Wild

The vulnerability has not been actively exploited yet, but it is expected that threat actors will exploit it soon.

Impact Analysis

Direct Impact

The direct impact of this vulnerability is arbitrary file deletion, which can lead to remote code execution, denial of service, and data loss.

Downstream & Cascading Effects

The downstream and cascading effects of this vulnerability include:

  • Remote code execution
  • Denial of service
  • Data loss

Affected Products & Versions

The vulnerability affects all versions of the Database for Contact Form 7, WPforms, Elementor forms plugin up to 1.5.1.

Detection & Threat Hunting

Indicators of Compromise

The indicators of compromise for this vulnerability include:

  • Unusual file deletion activity on the server
  • Suspicious requests to the view_page function

Detection Rules & Signatures

The detection rules and signatures for this vulnerability include:

  • Monitoring for unusual file deletion activity on the server
  • Monitoring for suspicious requests to the view_page function

Threat Hunting Queries

The threat hunting queries for this vulnerability include:

  • Searching for logs related to file deletion activity on the server
  • Searching for logs related to suspicious requests to the view_page function

Remediation & Hardening

Immediate Actions (0-24 hours)

The immediate actions to remediate this vulnerability include:

  • Upgrading to a patched version of the plugin

Short-Term Hardening (1-7 days)

The short-term hardening actions for this vulnerability include:

  • Monitoring for unusual file deletion activity on the server
  • Monitoring for suspicious requests to the view_page function

Strategic Recommendations

The strategic recommendations for this vulnerability include:

  • Regularly updating plugins and software to the latest versions
  • Implementing security monitoring and logging

Analyst Assessment

The analyst assessment of this vulnerability is that it is a high-severity vulnerability that can lead to remote code execution, denial of service, and data loss. The vulnerability has not been actively exploited yet, but it is expected that threat actors will exploit it soon. Therefore, it is recommended to upgrade to a patched version of the plugin as soon as possible.

Sources

  • National Vulnerability Database (NVD)