CVE-2026-3300
Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field
No known exploitation. EPSS puts it in the 91st percentile. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
4.4% chance of exploitation activity in the next 30 days, which ranks it in the 91st percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
- Attention now
unknown.
Real risk signals with little public attention so far.
Lifecycle
10 events over 177 days, from the signal feeds we watch.
- EPSS band changemoderate → lowepss band change
- EPSS band changelow → moderate
- EPSS band changelow → moderate
- EPSS band changelow → moderate
- Nuclei check added
- Record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 9.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
In the news
- Exposed Hacker Server Reveals WP-SHELLSTORM Backdooring Thousands of WordPress Sites
- ⚡ Weekly Recap: Instagram Account Hacks, Android Zero-Day, GitHub Worm and More
- Everest Forms Vulnerability Exploited to Hack WordPress Sites
- Critical Everest Forms Pro flaw exploited to take over WordPress sites
- Hackers Exploit Critical Everest Forms Pro WordPress Plugin Flaw to Take Over Sites
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