Stored XSS Vulnerability in Ninja Forms Plugin by WordPress
CVE-2026-84258
Key Information:
- Vendor
WordPress
- Vendor
- CVE Published:
- 11 October 2026
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What is CVE-2026-84258?
The click5 CRM add-on for the Ninja Forms WordPress plugin versions up to 1.0.1 is vulnerable to a stored Cross-Site Scripting (XSS) attack. This security issue arises because the plugin does not properly sanitize and escape content submitted through an unauthenticated endpoint before rendering it in the admin panel. The vulnerability poses a significant risk as it allows malicious users to inject code, which can be executed by high-privilege users, such as administrators, potentially leading to unauthorized actions or data exposure.
Affected Version(s)
click5 CRM add-on to Ninja Forms 0 <= 1.0.1
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.