CVE-2026-39440
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper Control of Generation of Code ('Code Injection') vulnerability in Funnelforms LLC FunnelFormsPro allows Remote Code Inclusion.This issue affects FunnelFormsPro: from n/a through 3.8.1.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA code injection vulnerability in FunnelFormsPro plugin (versions through 3.8.1) allows remote code inclusion. The vulnerability stems from improper control of code generation, enabling attackers to inject and execute malicious code remotely.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify FunnelFormsPro plugin is installedCheck the WordPress plugin directory or wp-content/plugins/ folder for the funnelformspro folder. In WordPress admin, go to Plugins > Installed Plugins and look for FunnelFormsPro.Affected if The plugin FunnelFormsPro is present in the WordPress installation
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Check installed version numberIn WordPress admin, find FunnelFormsPro in the Plugins list and note the version displayed below the plugin name. Alternatively, open the main plugin file (funnelforms-pro.php or similar) in wp-content/plugins/funnelformspro/ and look for the 'Version' header in the file comments.Affected if The version number is 3.8.1 or lower (any version through 3.8.1)
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Identify accessible PHP entry pointsList all PHP files in the funnelformspro plugin directory, especially those in /admin/, /public/, or /includes/ folders. Look for files that handle file includes, require statements, or dynamic code execution.Affected if PHP files that accept user input for include/require/include_once/require_once statements are found and publicly accessible
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Check for unauthorized PHP filesSearch the wp-content/uploads/ directory and other writable directories for newly created PHP files with suspicious names (e.g., shell.php, backdoor.php, cmd.php, .php files with random alphanumeric names).Affected if Unexpected PHP files exist in upload directories or other non-plugin folders indicating potential compromise
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Review access logs for code injection attemptsExamine web server access logs (Apache error.log, Nginx access.log) for requests to FunnelFormsPro PHP files containing suspicious patterns like '?page=', '?action=', or parameters with PHP code (<?php, eval, base64_decode, system, shell_exec).Affected if Log entries show requests with code injection payloads targeting FunnelFormsPro endpoints
You are affected if FunnelFormsPro version 3.8.1 or lower is installed and the plugin's PHP files handling code inclusion are accessible to unauthenticated users.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate FunnelFormsPro to the latest patched version. If no update is available, disable the plugin or implement input validation/sanitization at the application or WAF level to block malicious code injection attempts.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-39440 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-39440 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data