CVE-2026-12142: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in webaways NEX-Forms – Ultimate Forms Plugin for WordPress
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via '_name[]' Array Parameter in all versions up to, and including, 9.2.2 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 wp_kses() output filtering pass provides no mitigation because NEXForms_allowed_tags() explicitly permits <script>, <iframe src/srcdoc>, and JS event handlers such as onClick, onBlur, and onChange in its allow-list.
AI Analysis
Technical Summary
CVE-2026-12142 is a stored cross-site scripting vulnerability in the NEX-Forms – Ultimate Forms Plugin for WordPress affecting all versions up to 9.2.2. The vulnerability is due to improper neutralization of input during web page generation, specifically via the '_name[]' array parameter. The plugin's output filtering function, wp_kses(), is ineffective because the allow-list explicitly permits potentially dangerous HTML tags and JavaScript event handlers, enabling injection of arbitrary scripts by unauthenticated attackers. This can lead to script execution in the context of users visiting the injected pages.
Potential Impact
An unauthenticated attacker can inject arbitrary web scripts that execute in the browsers of users who visit the affected pages. This can lead to information disclosure, session hijacking, or other client-side impacts. The vulnerability does not affect availability but impacts confidentiality and integrity of user interactions with the affected site.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or removing the vulnerable plugin version. Avoid using versions up to and including 9.2.2. Monitor the vendor's communications for updates and patches addressing this vulnerability.
CVE-2026-12142: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in webaways NEX-Forms – Ultimate Forms Plugin for WordPress
Description
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via '_name[]' Array Parameter in all versions up to, and including, 9.2.2 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 wp_kses() output filtering pass provides no mitigation because NEXForms_allowed_tags() explicitly permits <script>, <iframe src/srcdoc>, and JS event handlers such as onClick, onBlur, and onChange in its allow-list.
CVSS v3.1
Score 7.2high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12142 is a stored cross-site scripting vulnerability in the NEX-Forms – Ultimate Forms Plugin for WordPress affecting all versions up to 9.2.2. The vulnerability is due to improper neutralization of input during web page generation, specifically via the '_name[]' array parameter. The plugin's output filtering function, wp_kses(), is ineffective because the allow-list explicitly permits potentially dangerous HTML tags and JavaScript event handlers, enabling injection of arbitrary scripts by unauthenticated attackers. This can lead to script execution in the context of users visiting the injected pages.
Potential Impact
An unauthenticated attacker can inject arbitrary web scripts that execute in the browsers of users who visit the affected pages. This can lead to information disclosure, session hijacking, or other client-side impacts. The vulnerability does not affect availability but impacts confidentiality and integrity of user interactions with the affected site.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or removing the vulnerable plugin version. Avoid using versions up to and including 9.2.2. Monitor the vendor's communications for updates and patches addressing this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-06-12T17:32:40.310Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a44f13827e9c797195bba2b
Added to database: 07/01/2026, 10:51:36 UTC
Last enriched: 07/08/2026, 12:56:07 UTC
Last updated: 08/16/2026, 00:41:10 UTC
Views: 70
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.