CVE-2026-2289
Taskbuilder <= 5.0.3 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Block Emails' Field
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
The Taskbuilder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 5.0.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
| CWE | CWE-79 |
| Vendor | taskbuilder |
| Product | taskbuilder – project management & task management tool with kanban board |
| Published | Mar 4, 2026 |
| Last Updated | Apr 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for taskbuilder taskbuilder – project management & task management tool with kanban board
Be the first to know when new medium vulnerabilities affecting taskbuilder taskbuilder – project management & task management tool with kanban board are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
taskbuilder / Taskbuilder – Project Management & Task Management Tool With Kanban Board
0 ≤ 5.0.3
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/81e26924-c9eb-4ddf-89e3-a8bf95d23b78?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/taskbuilder/trunk/includes/admin/email_notifications/wppm_get_en_general_setting.php#L30 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/taskbuilder/tags/5.0.1/includes/admin/email_notifications/wppm_get_en_general_setting.php#L30 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/taskbuilder/trunk/includes/class-wppm-functions.php#L19 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/taskbuilder/tags/5.0.1/includes/class-wppm-functions.php#L19 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3468819%40taskbuilder&new=3468819%40taskbuilder&sfp_email=&sfph_mail=
Credits
Phap Nguyen Anh