CVE-2026-9691
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 · uneditedUnauthenticated PHP Object Injection in Integration for ActiveCampaign and Contact Form 7, WPForms, Elementor, Ninja Forms <= 1.1.1 versions.
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 confidenceThis is an unauthenticated PHP Object Injection vulnerability in a WordPress plugin that provides integrations between form builders (Contact Form 7, WPForms, Elementor, Ninja Forms) and ActiveCampaign. The vulnerability allows remote attackers to inject malicious PHP objects by leveraging insecure deserialization of user-supplied input, potentially leading to remote code execution.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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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Identify the ActiveCampaign form integration pluginIn the WordPress admin dashboard, go to Plugins > Installed Plugins and look for any plugin that provides integration between Contact Form 7, WPForms, Elementor, or Ninja Forms and ActiveCampaign. Note the exact plugin name.Affected if The plugin is installed and provides ActiveCampaign form integrations.
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Locate the plugin version numberIn the Plugins list in WordPress admin, click on the plugin and look for the version number in the description, or inspect the main plugin PHP file in wp-content/plugins/[plugin-folder] and look for the 'Version' header in the plugin comment block.Affected if The installed version is less than or equal to 1.1.1, or if you cannot determine the version and the plugin has not been updated recently.
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Check for ActiveCampaign API connection settingsNavigate to the plugin settings page in WordPress admin (usually under Settings or the plugin name in the menu) and look for fields to enter ActiveCampaign API URL and API key. Also check if any form integrations are configured to send data to ActiveCampaign.Affected if ActiveCampaign integration is configured and the plugin is connecting to ActiveCampaign with API credentials.
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Inspect network requests for deserialization patternsIf you have access to server logs or can monitor traffic, check if the plugin exposes any endpoints (typically under /wp-admin/admin-ajax.php or /wp-json/) that accept serialized data or PHP object payloads in the request body or parameters.Affected if The plugin accepts and processes serialized data from unauthenticated requests without proper validation.
A user is affected if the plugin is installed with version 1.1.1 or lower and the ActiveCampaign integration functionality is active and 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 dataImmediately update the plugin to the latest version (greater than 1.1.1). If an update is not available, disable and remove the plugin until a patch is released. Consider implementing Web Application Firewall rules to detect and block serialization payloads while the vulnerability remains unpatched.
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-9691 — 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-2026-9691 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