Is CVE-2026-3300 actively exploited?

Yes. CVE-2026-3300 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2026-3300 be exploited remotely?

Yes. CVE-2026-3300 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3300?

CVE-2026-3300 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2026-3300

CRITICALCISA KEVIN THE WILD

CVE-2026-3300

CWE-94Published: March 31, 2026· Updated: Apr 1, 2026

9.8

CVSS v3.1

EPSS:0.22%probability of exploitation in 30 daysPercentile:44.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-3300 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CISA has added CVE-2026-3300 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Mentioned vendors (from description):

WordPressPHP

CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

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News & Research Mentioning CVE-2026-3300

Critical Everest Forms Pro flaw exploited to take over WordPress sites

BleepingComputer· Jun 6, 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. [...] [xlite_meta score:64 src:BleepingComputer xlite_fp:eab3ea3ea102641023a0210bbe511b7faee1b0030d29a66d4d02f6dec7b5556a]

Hackers Exploit Critical Everest Forms Pro WordPress Plugin Flaw to Take Over Sites

The Hacker News· Jun 5, 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 [xlite_meta score:50 src:The Hacker News xlite_fp:500aad77f6bc1b419409ab3b559dc25ea62aa225ccdf6a02cbf5320578a764fe]