webaways NEX-Forms Plugin up to 9.1.11 on WordPress POST Parameter submit_nex_form cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in webaways NEX-Forms Plugin up to 9.1.11 on WordPress. This affects the function submit_nex_form of the component POST Parameter Handler. Executing a manipulation can lead to cross site scripting. The identification of this vulnerability is CVE-2026-5063. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in webaways NEX-Forms Plugin up to 9.1.11 on WordPress. This vulnerability affects the function submit_nex_form of the component POST Parameter Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

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 submit_nex_form() 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.

The weakness was shared by Naoya Takahashi. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-5063 since 03/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26815). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• webaways

Name

• NEX-Forms Plugin

Version

• 9.1.0
• 9.1.1
• 9.1.2
• 9.1.3
• 9.1.4
• 9.1.5
• 9.1.6
• 9.1.7
• 9.1.8
• 9.1.9
• 9.1.10
• 9.1.11

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion