CVE-2026-5063: NEX-Forms <= 9.1.11 - Unauthenticated Stored Cross-Site Scripting via POST Parameter Key Names
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via POST parameter key names in the submitnexform() function in versions up to, and including, 9.1.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-5063?
CVE-2026-5063 is classified as a medium severity vulnerability due to its potential for exploitation through Stored Cross-Site Scripting.
How do I fix CVE-2026-5063?
To fix CVE-2026-5063, update the NEX-Forms – Ultimate Forms Plugin for WordPress to version 9.1.12 or later.
Which versions are affected by CVE-2026-5063?
CVE-2026-5063 affects all versions of NEX-Forms – Ultimate Forms Plugin for WordPress up to and including version 9.1.11.
What kind of attack is CVE-2026-5063 associated with?
CVE-2026-5063 is associated with Stored Cross-Site Scripting (XSS) attacks via the submit_nex_form() function.
Is user authentication required to exploit CVE-2026-5063?
No, CVE-2026-5063 can be exploited without user authentication.