TI-2026-78625 Aliases CVE-2026-110899 GHSA-ww28-j4j5-3mp6

Stored XSS in WordPress Ninja Forms plugin

LOW 31CWE-79Published 2026-10-21 · Updated 2026-10-30

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Ninja Forms plugin for WordPress by Kevin Stover, through version 3.15.5, does not neutralize user input in generated web pages, which is a stored XSS flaw (CWE-79). An unauthenticated remote attacker can store script that runs in a victim's browser when the victim interacts with the affected page.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kevin Stover Ninja Forms ninja-forms allows Stored XSS.This issue affects Ninja Forms: from n/a through 3.15.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00215 11th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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
Kevin Stover	Ninja Forms	up to 3.15.5	—	No fix listed	CNA

Ninja Forms VendorKevin Stover Affected up to 3.15.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Ninja Forms.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-21 Threatist record created from CVE-2026-110899
2026-10-21 Alias added: GHSA-ww28-j4j5-3mp6

References

Other 1

https://patchstack.com/database/wordpress/plugin/ninja-forms/vulnerability/wordpress-ninja-forms-plugin-3-15-5-cross-site-scripting-xss-vulnerability?_s_id=cve

TI-2026-63630 WordPress Ninja Forms plugin <= 3.15.3 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
TI-2026-65380 WordPress Ninja Forms plugin <= 3.15.3 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences