CVE-2026-2289Network attack vector

Administrator-level script execution via Block Emails setting

Published Mar 4, 2026 · Updated Mar 4, 2026

Stored XSS in Taskbuilder 5.0.3 and earlier allows remote authenticated users to execute scripts through the Block Emails setting. The Block Emails admin setting accepts unsanitized content, and wppm_get_en_general_setting.php renders the stored value without context-appropriate escaping. Exploitation requires administrator access and either a multisite installation or an installation with unfiltered_html disabled; injected scripts run when a user opens the affected page.

CVSS severity4.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Taskbuilder 5.0.3 and earlier allows remote authenticated users to execute scripts through the Block Emails setting. The Block Emails admin setting accepts unsanitized content, and wppm_get_en_general_setting.php renders the stored value without context-appropriate escaping. Exploitation requires administrator access and either a multisite installation or an installation with unfiltered_html disabled; injected scripts run when a user opens the affected page.

The record

CVE
CVE-2026-2289
Published
Mar 4, 2026
Updated
Mar 4, 2026
Vendor
Taskbuilder
Product
Taskbuilder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=5.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Taskbuilder · Taskbuilderversion=* <=5.0.3

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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