Ninja Forms Plugin up to 3.14.9 on WordPress shortcode injection

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k1.07

Summaryinfo

A vulnerability was found in Ninja Forms Plugin up to 3.14.9. It has been declared as critical. This issue affects some unknown processing of the component shortcode Handler. The manipulation results in injection. This vulnerability is reported as CVE-2026-15256. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Ninja Forms Plugin up to 3.14.9. Affected is some unknown processing of the component shortcode Handler. The manipulation with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at wpscan.com. This vulnerability is traded as CVE-2026-15256 since 07/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1055 by the MITRE ATT&CK project.

Upgrading to version 3.14.10 eliminates this vulnerability.

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Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Ninja Forms Plugin 3.14.10

Timelineinfo

07/09/2026 CVE reserved
08/06/2026 +28 days VulDB entry created
08/07/2026 +0 days Advisory disclosed
08/07/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: wpscan.com
Status: Confirmed

CVE: CVE-2026-15256 (🔒)
GCVE (CVE): GCVE-0-2026-15256
GCVE (VulDB): GCVE-100-386742

Entryinfo

Created: 08/07/2026 00:57
Changes: 08/07/2026 00:57 (55)
Complete: 🔍
Cache ID: 216::103

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