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

Status: published. Published: 2026-11-14. Updated: 2026-11-14.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- ninjateam / Multi Step for Contact Form 7: ≥ 0; ≤ 2.9.1 (affected, semver). Source: CNA: Wordfence

## Severity and prioritization

- CVSS 3.1: 7.2 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N; source: CNA: Wordfence

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b9700627-97f2-4da1-a984-934062bd5014?source=cve (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/cf7-multi-step/tags/2.9.1/inc/frontend/validation.php#L330 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/cf7-multi-step/tags/2.9.1/inc/frontend/validation.php#L291 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/cf7-multi-step/tags/2.9.1/inc/frontend/validation.php#L20 (CNA: Wordfence)

- https://wordpress.org/plugins/cf7-multi-step/ (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/cf7-multi-step/tags/2.9.2/inc/frontend/validation.php (CNA: Wordfence)

## Provenance

- CNA: Wordfence: https://www.cve.org/CVERecord?id=CVE-2026-116753; retrieved 2026-11-14; source updated 2026-11-14

Revision: 01cbcb153ae7dc8f850390c4e741070444f42c99a3b71ca5c4d00ad7e437b40a

Canonical: https://y2.dev/cve/CVE-2026-116753

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