CVE-2026-15256 — MEDIUM (4.8)

Vulnerability 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.

CVSS Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-74

References

https://wpscan.com/vulnerability/9c96f977-c105-4b45-a3cd-4751fb4aa5a1/

FAQ

What is CVE-2026-15256?

CVE-2026-15256 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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 unau...

How severe is CVE-2026-15256?

CVE-2026-15256 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-15256?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.