Everest Forms Pro <= 1.9.12 — Unauthenticated Remote Code Execution via Calculation Field
CVE-2026-3300Published · Updated Action summary
Affected: ≤1.9.12Update to 1.9.13 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Everest Forms Pro everest-forms-pro
- Affected≤ 1.9.12
- Patched in1.9.13
Update to 1.9.13 or newer.
You are affected if you run ≤ 1.9.12. Version 1.9.13 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Everest Forms Pro.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.9.13, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Everest Forms Pro to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to h0xilo.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Everest Forms Pro
All 4| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤1.9.12Update to 1.9.13 | CVE-2026-27070 | |
| Medium5.6 | Unauthenticated PHP Object Injection via PHAR Deserialization in Form Signature ≤1.9.7Update to 1.9.8 | CVE-2025-8871 | |
| High7.5 | Unauthenticated Path Traversal to Arbitrary File Deletion ≤1.9.4Update to 1.9.5 | CVE-2025-5927 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤1.9.12Update to 1.9.13
- Medium5.6Unauthenticated PHP Object Injection via PHAR Deserialization in Form Signature
≤1.9.7Update to 1.9.8
- High7.5Unauthenticated Path Traversal to Arbitrary File Deletion
≤1.9.4Update to 1.9.5
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.