Stored Cross-Site Scripting in Taskbuilder Plugin for WordPress
CVE-2026-2289

4.4MEDIUM

Key Information:

Vendor

WordPress
Status
Taskbuilder – Project Management & Task Management Tool With Kanban Board
Vendor
CVE Published:
4 March 2026

What is CVE-2026-2289?

The Taskbuilder plugin for WordPress has a vulnerability that allows authenticated attackers with administrator permissions to exploit stored cross-site scripting through insufficient input sanitization and output escaping in the admin settings. This issue is present in all versions up to and including 5.0.3, specifically affecting multi-site installations where 'unfiltered_html' is disabled. When exploited, the vulnerability enables attackers to inject malicious web scripts that execute whenever users access compromised pages, exposing them to security risks.

Affected Version(s)

Taskbuilder – Project Management & Task Management Tool With Kanban Board 0 <= 5.0.3

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/taskbuilder/tr...
https://plugins.trac.wordpress.org/browser/taskbuilder/ta...

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Phap Nguyen Anh
.