High severity · published Oct 21, 2026
CVE-2026-110899
WordPress Ninja Forms plugin <= 3.15.5 - Cross Site Scripting (XSS) vulnerability
7.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
Ninja Forms · Kevin Stover
through 3.15.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-110899
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-110899
patchstack.com
https://patchstack.com/database/wordpress/plugin/ninja-forms/vulnerability/wordpress-ninja-forms-plugin-3-15-5-cross-site-scripting-xss-vulnerability?_s_id=cve
More from Ninja Forms
7.1
CVE-2026-102385
WordPress Ninja Forms plugin <= 3.15.3 - Cross Site Scripting (XSS) vulnerability
7.1
CVE-2026-95515
WordPress Ninja Forms plugin <= 3.15.3 - Cross Site Scripting (XSS) vulnerability
4.8
CVE-2024-50514
WordPress Ninja Forms – The Contact Form Builder That Grows With You plugin <= 3.8.16 - Cross Site Scripting (XSS) vulnerability
4.8
CVE-2024-50515
WordPress Ninja Forms – The Contact Form Builder That Grows With You plugin <= 3.8.16 - Cross Site Scripting (XSS) vulnerability