CVE-2026-116753: Multi Step for Contact Form 7 <= 2.9.1 - Unauthenticated Stored Cross-Site Scripting via Multipart Field Name

Q: Which sites are exposed to this issue?

Sites using Multi Step for Contact Form 7 version 2.9.1 or earlier are exposed only when the affected CF7 form has “Save every step” enabled and the Database for Contact Form 7 companion plugin is active with its “Expandable” table option enabled.

Q: Are default installations affected?

The required “Save every step” and “Expandable” options are both disabled by default. A default configuration without those options enabled does not meet the stated exploitation conditions.

Q: Does exploitation require an attacker account or user interaction?

No attacker authentication or victim interaction is required to inject the payload. The stored script executes when a user later accesses an injected page.

Q: What can be done if updating is not immediately possible?

Disable “Save every step” on affected CF7 forms, or disable the Database for Contact Form 7 companion plugin’s “Expandable” table option. These settings are required for successful exploitation.

Published Nov 14, 2026

Updated

The Multi Step for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'multipart field name (array key)' parameter in all versions up to, and including, 2.9.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires the target CF7 form to have the 'Save every step' option enabled and the Database for Contact Form 7 companion plugin to be active with its 'Expandable' table option enabled, both of which are disabled by default.

Affected Software

1 affected component

Webhead Multi Step for Contact Form 7<=2.9.1

Event History

Nov 14, 2026

CVE Published

via MITRE·03:32 PM

Data Sourced

via MITRE·03:32 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·04:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Which sites are exposed to this issue?

Sites using Multi Step for Contact Form 7 version 2.9.1 or earlier are exposed only when the affected CF7 form has “Save every step” enabled and the Database for Contact Form 7 companion plugin is active with its “Expandable” table option enabled.

Are default installations affected?

The required “Save every step” and “Expandable” options are both disabled by default. A default configuration without those options enabled does not meet the stated exploitation conditions.

Does exploitation require an attacker account or user interaction?

No attacker authentication or victim interaction is required to inject the payload. The stored script executes when a user later accesses an injected page.

What can be done if updating is not immediately possible?

Disable “Save every step” on affected CF7 forms, or disable the Database for Contact Form 7 companion plugin’s “Expandable” table option. These settings are required for successful exploitation.

CVE-2026-116753: Multi Step for Contact Form 7 <= 2.9.1 - Unauthenticated Stored Cross-Site Scripting via Multipart Field Name

Affected Software

Event History

Frequently Asked Questions

Which sites are exposed to this issue?

Are default installations affected?

Does exploitation require an attacker account or user interaction?

What can be done if updating is not immediately possible?

Company

Resources

Contact

Frequently Asked Questions

Which sites are exposed to this issue?

Are default installations affected?

Does exploitation require an attacker account or user interaction?

What can be done if updating is not immediately possible?