CVE-2026-101326 Details
Description
The The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes. Exploitation requires that an administrator has configured at least one Ninja Forms field with its Default Value set to the {wp:user_display_name} merge tag on a publicly accessible page; a Subscriber need only set their display_name to a shortcode string via their profile and then visit that page.
A vulnerability allowing arbitrary shortcode execution has been identified in the Ninja Forms WordPress plugin, specifically in versions through 3.15.5. This issue arises because the plugin fails to properly validate values before executing them as shortcodes. As a result, authenticated attackers with subscriber-level access or higher can execute arbitrary shortcodes. Exploitation requires that an administrator has set a Ninja Forms field's Default Value to the {wp:user_display_name} merge tag on a publicly accessible page. A subscriber can then change their display_name to a shortcode string and visit that page to trigger the execution.
Users are advised to update the Ninja Forms WordPress plugin to version 3.15.6 or a newer patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 31, 2026CISA-ADP
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Ninja Forms | <= 3.15.5 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | CVE Modified | CISA-ADP |
| Oct 31, 2026 | New CVE Received | [email protected] |