Vulnerability · Published Aug 6, 2026 · Assigned by WPScan
CVE-2026-15256Ninja Forms < 3.14.10 - Unauthenticated Arbitrary Shortcode Execution via Query-String Populated Field Default
Medium 4.8
In plain English
A medium-severity injection in Ninja Forms from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.2%top 84.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The Ninja Forms WordPress plugin before 3.14.10 does not prevent user-supplied query-string input, used to pre-populate a form field's default value, from being processed as a shortcode, allowing unauthenticated attackers to execute arbitrary shortcodes registered on the site when a form so configured is embedded on a public page.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Ninja Forms | 0 – before 3.14.10 |
Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- https://wpscan.com/vulnerability/9c96f977-c105-4b45-a3cd-4751fb4aa5a1/ exploit, vdb-entry, technical-description