Stored XSS Vulnerability in Contact Form 7 Plugin by WordPress
CVE-2026-84261

8.8HIGH

Key Information:

Vendor

WordPress
Status
Click5 Crm Add-on To Contact Form 7
Vendor
CVE Published:
11 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84261?

The click5 CRM add-on for the Contact Form 7 WordPress plugin does not properly sanitize and escape data submitted through an unauthenticated endpoint. This flaw allows for the execution of stored cross-site scripting (XSS) attacks. When an admin views the compromised admin page, attackers could exploit this vulnerability to execute malicious scripts, jeopardizing the security of high-privilege users within the system.

Affected Version(s)

click5 CRM add-on to Contact Form 7 0 <= 1.0.4

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.

CVE-2026-84261 - Proof of Concept

References

https://wpscan.com/vulnerability/91689a2c-a282-496b-b295-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Erwan LR (WPScan)
WPScan
.