CVE-2026-1640Network attack vector

Unauthorized comment creation via unchecked AJAX handlers

Published Feb 18, 2026 · Updated Feb 18, 2026

Authorization bypass in Taskbuilder 5.0.2 and earlier allows remote authenticated users to add comments to any project or task. The wppm_submit_proj_comment and wppm_submit_task_comment AJAX handlers accept target identifiers without checking the caller's assignment or visibility, then store an insufficiently sanitized comment_body value. Subscriber-level access is sufficient; comments can target private records and persist arbitrary HTML and CSS, but no code execution is reported.

CVSS severity4.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Taskbuilder 5.0.2 and earlier allows remote authenticated users to add comments to any project or task. The wppm_submit_proj_comment and wppm_submit_task_comment AJAX handlers accept target identifiers without checking the caller's assignment or visibility, then store an insufficiently sanitized comment_body value. Subscriber-level access is sufficient; comments can target private records and persist arbitrary HTML and CSS, but no code execution is reported.

The record

CVE
CVE-2026-1640
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
Taskbuilder
Product
Taskbuilder
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=* <=5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Taskbuilder · Taskbuilderversion=* <=5.0.2

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

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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