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CVE-2026-15256

Ninja Forms < 3.14.10 - Unauthenticated Arbitrary Shortcode Execution via Query-String Populated Field Default

MEDIUM
4.8
CVSS Score
Published: August 6, 2026 at 05:14 PM UTC
Updated: August 26, 2026 at 04:31 PM UTC
1 product affected across 1 vendorNinjaforms

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.2%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ninjaforms· Ninjaformswordpress-plugin
60%
v < 3.14.10
Affected range stops below 3.14.10, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description
Source: [email protected]
https://wpscan.com/vulnerability/9c96f977-c105-4b45-a3cd-4751fb4aa5a1/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMWPScan
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-74

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