Taskbuilder <= 5.0.3 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Block Emails' Field

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-2289
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-04 02:15:54 UTC
Updated2026-04-22 21:26:58 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.000110000 probability, percentile 0.013960000 (date 2026-04-22)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Taskbuilder Taskbuilder Project Management Task Management Tool With Kanban Board affected 5.0.3 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/taskbuilder/trunk/includes/class-wppm-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/taskbuilder/trunk/includes/admin/email_notifications/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/81e26924-c9eb-4ddf-89e3-a8bf9... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/taskbuilder/tags/5.0.1/includes/admin/email_notificat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/taskbuilder/tags/5.0.1/includes/class-wppm-functions.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Phap Nguyen Anh (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-02-10T15:32:28.000ZVendor Notified
CNA2026-03-03T12:40:33.000ZDisclosed
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