CVE-2026-3300
CriticalExploitedEverest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field
Published Mar 31, 2026 · Updated Apr 8, 2026 · Also known as 389c0b89-e408-4ad5-9723-a16b745771f0
Key Facts
Patch immediately- CVE-2026-3300 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Everest Forms Pro (wordpress-plugin).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jun 3, 2026. No public exploit code is known.
- EPSS estimates a 4.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Everest Forms Pro 1.9.13.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
4.4%
Higher than 91.2% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
None known
Get the full CVE-2026-3300 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jun 3, 2026 | n/a | Not reported |
| CIRCL KEV | Jun 5, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Everest Forms Prowordpress-plugin | See advisory | 1.9.13 |
Patched Releases
Everest Forms Pro
1.9.13
Timeline
Publicly disclosed
Mar 31, 2026
Last updated
Apr 8, 2026
Added to Industry KEV feed
Jun 3, 2026
Added to CIRCL KEV
Jun 5, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/389c0b89-e408-4ad5-9723-a16b745771f0?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/389c0b89-e408-4ad5-9723-a16b745771f0?source=api-scan
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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.
Affected: Everest Forms Pro (wordpress-plugin). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jun 3, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Everest Forms Pro 1.9.13.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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