PT-2026-36681 · WordPress · Nex-Forms

Naoya Takahashi · Published 2026-05-03 · Updated 2026-05-03 · CVE-2026-5063

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions NEX-Forms – Ultimate Forms Plugin for WordPress versions prior to 9.1.12

Description Insufficient input sanitization and output escaping in the submit nex form() function allow unauthenticated attackers to inject arbitrary web scripts via POST parameter key names. These scripts execute whenever a user accesses an affected page. This is a Stored Cross-Site Scripting issue, where malicious scripts are permanently stored on the target server.

Recommendations Update the plugin to a version later than 9.1.11. As a temporary workaround, restrict access to the submit nex form() function to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-5063

Affected Products

Nex-Forms

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-5063 · Security Note
• https://t.me/CVEtracker/52558 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2050832587417878730 · Twitter Post
• https://t.me/cveNotify/161910 · Telegram Post
• https://twitter.com/vuldb/status/2051050312681820387 · Twitter Post
• https://plugins.trac.wordpress.org/changeset/3513524/nex-forms-express-wp-form-builder · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/9bac82ee-55bf-4381-b441-115a675e4834?source=cve · Note