WordPress security changelog
MEDIUM CVE-2026-2289 Deferred

Taskbuilder: Cross-site scripting

Taskbuilder is affected by cross-site scripting. Exploitation requires an authenticated WordPress account. Injected script can execute in the affected site's origin when the vulnerable output is viewed.

CVE / CNA score 4.4 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Taskbuilder
Plugin slug
taskbuilder
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Mar 04, 2026
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Mar 04, 2026 and is one of 16 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Taskbuilder to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

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.

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

References

Primary and upstream sources