Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Everest Forms Pro | <= 1.9.12 | 1.9.13 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-94- Platform
- WordPress
- Package
Everest Forms Pro- Disclosed
- 30.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 389c0b89-e408-4ad5-9723-a16b745771f0 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Everest Forms Pro
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 06.2025 03.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 2
- Medium 1
Disclosures per year
- 2025: 2
- 2026: 2
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Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field this entry
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