Ninja Forms < 3.14.10 - Unauthenticated Arbitrary Shortcode Execution via Query-String Populated Field Default
Priority MEDIUM 55CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00243 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Ninja Forms (Unknown): 3.14.10
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Ninja Forms | before 3.14.10 | 3.14.10 | Patch available | CNA |
- Ninja Forms VendorUnknown Affected before 3.14.10 Fixed in 3.14.10 Patch available CNA
Remediation
- Fix · CNA Ninja Forms (Unknown) Fixed in 3.14.10
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15256
- 2026-10-03 Alias added: GHSA-2xwp-m9v6-767p
References
Sources
- CVE-2026-15256 · CVE Program
- CVE-2026-15256 · NVD
- FIRST EPSS
- GHSA-2xwp-m9v6-767p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences