Taskbuilder <= 5.0.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Project/Task Comment Creation
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
The Taskbuilder – WordPress Project Management & Task Management plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 5.0.2. This is due to missing authorization checks on the project and task comment submission functions (AJAX actions: wppm_submit_proj_comment and wppm_submit_task_comment). This makes it possible for authenticated attackers, with subscriber-level access and above, to create comments on any project or task (including private projects they cannot view or are not assigned to), and inject arbitrary HTML and CSS via the insufficiently sanitized comment_body parameter.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| taskbuilder | Taskbuilder – Project Management & Task Management Tool With Kanban Board | up to 5.0.2 | — | No fix listed | CNA |
- Taskbuilder – Project Management & Task Management Tool With Kanban Board Vendortaskbuilder Affected up to 5.0.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-1640
- 2026-10-03 Alias added: GHSA-wxhm-86c2-x66c
References
Other 3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/66095908-875f-486d-ae77-6015671872de?source=cve
- https://plugins.trac.wordpress.org/browser/taskbuilder/tags/5.0.2/includes/admin/projects/open_project/wppm_submit_project_comment.php#L6
- https://plugins.trac.wordpress.org/browser/taskbuilder/tags/5.0.2/includes/admin/tasks/open_task/wppm_submit_task_comment.php#L6
More taskbuilder vulnerabilities
- TI-2024-09124 Taskbuilder < 3.0.9 - Admin+ SQL Injection CVSS 3.1HIGH 7.2
- TI-2024-09121 Taskbuilder < 3.0.5 - Admin+ SQL Injection CVSS 3.1MEDIUM 4.1
- TI-2025-16598 WordPress Taskbuilder Plugin <= 3.0.6 - SQL Injection vulnerability CVSS 3.1HIGH 8.8
- TI-2026-37822 WordPress Taskbuilder plugin <= 5.0.7 - SQL Injection vulnerability CVSS 3.1HIGH 8.5
- TI-2025-26311 WordPress Taskbuilder plugin <= 4.0.1 - SQL Injection Vulnerability CVSS 3.1HIGH 8.5
- TI-2026-69938 Blind SQL injection in WordPress Taskbuilder plugin CVSS 3.1HIGH 8.5
Sources
- CVE-2026-1640 · CVE Program
- CVE-2026-1640 · NVD
- FIRST EPSS
- GHSA-wxhm-86c2-x66c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences