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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WPEverest | Everest Forms Pro | ≤ 1.9.12 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 2 repositories
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HORKimhab/CVE-2026-3300 ★ 0 · Jun 5, 2026
CVE-2026-3300
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adamshaikhma/CVE-2026-3300 ★ 0 · Jun 5, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Everest Forms Pro <= 1.9.12 - Unauthenticated RCE via Calculation Formula Injection http/cves/2026/CVE-2026-3300.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.