Cross Site Scripting Vulnerability in WPComplete Plugin by WordPress
CVE-2026-66599

7.1HIGH

Key Information:

Vendor

WordPress
Status
WPcomplete
Vendor
CVE Published:
24 August 2026

What is CVE-2026-66599?

An unauthenticated Cross Site Scripting (XSS) vulnerability exists in versions of the WPComplete plugin up to and including 2.9.5.6. This flaw allows attackers to inject malicious scripts into web pages viewed by users, potentially leading to data theft or session hijacking. Website administrators using vulnerable versions of WPComplete should take immediate action to update their plugins to prevent exploitation and safeguard their site.

Affected Version(s)

WPComplete <= 2.9.5.6

References

https://patchstack.com/database/wordpress/plugin/wpcomple...
vdb-entry

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Asim Alshaya | Patchstack Bug Bounty Program
.