CVE-2026-3300
High PUBLISHEDEverest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field
Not yet in CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Mar 31, 2026
- Exploitation Reported
- Jun 05, 2026
- CVSS
- 9.8 Critical
- EPSS
- 41.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| WPEverest |
Everest Forms Pro
|
* to <= 1.9.12 |
Affected |
CVE References
- wordfence.com/threat-intel/vulnerabilities/id/389c0b89-e40... wordfence.com · CVE Record https://www.wordfence.com/threat-intel/vulnerabilities/id/389c0b89-e4...
- plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.3/includes/cl... plugins.trac.wordpress.org · CVE Record https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.3/i...
- everestforms.net/changelog everestforms.net · CVE Record https://everestforms.net/changelog/
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| TheHackerNews First | 2026-06-05 09:20 UTC |
| BleepingComputer | 2026-06-06 14:20 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3300.yaml | Jun 12, 2026 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-05 09:20:13 UTC · TheHackerNews
Proof of concept available
Recorded 2026-06-05 14:19:34 UTC · GitHub
Weaknesses (CWE)
-
Improper Control of Generation of Code ('Code Injection')
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3300.yaml | Jun 12, 2026 |
Recent Mentions
BleepingComputer · Jun 06, 2026
Hackers are actively exploiting a critical vulnerability (CVE-2026-3300) in the Everest Forms Pro plugin, which lets them take complete control of a WordPress website. [...]
TheHackerNews · Jun 05, 2026
Threat actors are actively exploiting a critical security flaw in Everest Forms Pro, a WordPress plugin with about 4,000 active installations, to execute arbitrary code, leading to a complete site compromise. The vulnerability in question is CVE-2026-3300 (CVSS score: 9.8), a remote code execution bug impacting all versions of the plugin up to, and including, 1.9.12. A patch for the flaw was
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-06-05 14:19:34 UTC · 0 stars
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
04:30 UTC about 1 month ago04:30 UTC · about 1 month ago
Nuclei template available
Scanner coverage available
-
14:20 UTC about 1 month ago14:20 UTC · about 1 month ago
KEV confirmed by BleepingComputer
Exploitation attested by an external source
-
09:20 UTC about 2 months ago09:20 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
08:40 UTC about 2 months ago08:40 UTC · about 2 months ago
Public PoC available
Public proof-of-concept code published
-
01:24 UTC 4 months ago01:24 UTC · 4 months ago
CVE published
Vulnerability disclosed publicly
-
20:26 UTC 5 months ago20:26 UTC · 5 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-3300
{
"cve_id": "CVE-2026-3300",
"title": "Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calcu...",
"affected_vendor": "WPEverest",
"affected_product": "Everest Forms Pro",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "High",
"cvss_score": 9.8,
"epss_score": 0.40992,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}