TI-2026-84428 Aliases CVE-2026-116858 GHSA-gcch-59vx-gx8q

Cross-site scripting in WPMU DEV Forminator plugin for WordPress

LOW 19CWE-80Published 2026-11-03 · Updated 2026-11-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-80.

Summary

WPMU DEV Forminator for WordPress, versions through 1.58.3, does not neutralize script-related HTML tags in web pages (CWE-80). A remote attacker with low privileges can inject script that runs in another user's browser without any user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in WPMU DEV Forminator forminator allows Code Injection.This issue affects Forminator: from n/a through 1.58.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00173 6th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
wpmudev	Forminator	up to 1.58.3	—	No fix listed	CNA

Forminator Vendorwpmudev Affected up to 1.58.3 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:incsub:forminator::::::::	—	—	Incsub

cpe:2.3:a:incsub:forminator:*:*:*:*:*:*:*:* Versions — — ·Incsub

Remediation

The sources list no fixed version for Forminator.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Timeline

2026-11-03 Threatist record created from CVE-2026-116858
2026-11-03 Alias added: GHSA-gcch-59vx-gx8q
2026-11-04 CISA SSVC decision points changed

References

Other 1

https://patchstack.com/database/wordpress/plugin/forminator/vulnerability/wordpress-forminator-plugin-1-58-3-content-injection-vulnerability?_s_id=cve

TI-2023-04240 Forminator <= 1.24.6 - Unauthenticated Arbitrary File Upload CVSS 3.1CRITICAL 9.8
TI-2023-04683 Defender Security < 4.1.0 - Protection Bypass (Hidden Login Page) CVSS 3.1MEDIUM 5.3
TI-2026-13248 Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration CVSS 3.1CRITICAL 9.8
TI-2025-05864 Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.44.2… CVSS 3.1HIGH 8.8
TI-2024-20466 SQL injection in wpmudev Forminator CVSS 3.1HIGH 7.2
TI-2024-07873 Hustle < 7.8.5 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8

See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences