What’s Vulnerable › Vulnerabilities

CVE-2026-15161: Ninja Forms - Excel Export <= 3.3.6 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'filter' Parameter

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-17 · updated 2026-10-24
• Weakness: CWE-79

Description

The Ninja Forms - Excel Export plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.3.6. This is due to the save_filter() AJAX handler storing the raw $_POST['filter'] array into a WordPress option via update_option() without any capability check, nonce verification, or input sanitization, combined with the get_filter_row() method on the admin Excel Export screen concatenating the stored filter values (field_key, condition, value) directly into HTML attributes without esc_attr(). This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• SaturdayDrive Ninja Forms - Excel Export: through 3.3.6

References

• https://plugins.trac.wordpress.org/browser/ninja-forms-excel-export/trunk/includes/Admin/Menus/ExcelExport.php#L236
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e9ab836b-2798-43bd-b43b-8b7c7e81d42f?source=cve

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