Description
The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon's process_filter() function concatenating user-submitted form field values into a PHP code string without proper escaping before passing it to eval(). The sanitize_text_field() function applied to input does not escape single quotes or other PHP code context characters. This makes it possible for unauthenticated attackers to inject and execute arbitrary PHP code on the server by submitting a crafted value in any string-type form field (text, email, URL, select, radio) when a form uses the "Complex Calculation" feature.
Published: 2026-03-31
Score: 9.8 Critical
EPSS: 41.0% Moderate
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability allows an unauthenticated attacker to inject arbitrary PHP code by string‑type form field when the "Complex Calculation" feature is enabled. The plugin’s processing concatenates the unescaped input into a PHP code string and passes it to eval(), enabling the execution of attacker‑supplied code on the web server. This flaw, a CWE‑94 code injection vulnerability, directly compromises the confidentiality, integrity, and availability of the affected WordPress site, allowing full system takeover.

Affected Systems

Vulnerable installations of the WPEverest Everest Forms Pro WordPress plugin up to and including version 1.9.12 are affected. All WordPress sites that load any of these plugin versions and use the Complex Calculation feature in their forms are at risk. The impact is limited to installations running the specified plugin versions; newer releases are not impacted.

Risk and Exploitability

The CVSS base score of 9.8 indicates critical severity. The EPSS score of 41% indicates a higher likelihood that the vulnerability may be actively exploited, though it remains unlisted in the CISA KEV catalog. No authentication is required, and an attacker can submit data from any external source, making exploitation technically feasible; current exploitation activity is higher due to the EPSS figure, yet remains limited.

Generated by OpenCVE AI on June 24, 2026 at 12:37 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade the Everest Forms Pro plugin to the latest available version (>=1.9.13) as released by the vendor to remove the vulnerable "Complex Calculation" code.
  • If an upgrade cannot be performed immediately, temporarily disable the "Complex Calculation" feature on all forms that use it until the plugin is updated.
  • Apply additional input validation or access controls, such as restricting form submissions to authenticated users, adding CAPTCHA verification, or configuring a Web Application Firewall/security plugin (e.g., Wordfence) to block malicious payloads.

Generated by OpenCVE AI on June 24, 2026 at 12:37 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Wpeverest
Wpeverest everest Forms
Vendors & Products Wordpress
Wordpress wordpress
Wpeverest
Wpeverest everest Forms

Tue, 31 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 31 Mar 2026 03:00:00 +0000

Type Values Removed Values Added
Description The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon's process_filter() function concatenating user-submitted form field values into a PHP code string without proper escaping before passing it to eval(). The sanitize_text_field() function applied to input does not escape single quotes or other PHP code context characters. This makes it possible for unauthenticated attackers to inject and execute arbitrary PHP code on the server by submitting a crafted value in any string-type form field (text, email, URL, select, radio) when a form uses the "Complex Calculation" feature.
Title Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Wordpress Wordpress
Wpeverest Everest Forms
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-04-08T16:46:32.896Z

Reserved: 2026-02-26T20:26:05.469Z

Link: CVE-2026-3300

cve-icon Vulnrichment

Updated: 2026-03-31T13:59:07.047Z

cve-icon NVD

Status : Deferred

Published: 2026-03-31T02:15:59.267

Modified: 2026-06-17T10:43:22.287

Link: CVE-2026-3300

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-24T12:45:04Z

Weaknesses
  • CWE-94

    Improper Control of Generation of Code ('Code Injection')