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TI-2026-23201 Aliases CVE-2026-29056

Kanboard's privilege escalation via mass assignment in user invite registration allows any invited user to become admin

Priority HIGH 70CWE-915Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Tampering
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-915.

Summary

Kanboard is project management software focused on Kanban methodology. Prior to 1.2.51, Kanboard's user invite registration endpoint (`UserInviteController::register()`) accepts all POST parameters and passes them to `UserModel::create()` without filtering out the `role` field. An attacker who receives an invite link can inject `role=app-admin` in the registration form to create an administrator account. Version 1.2.51 fixes the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed kanboard (kanboard): 1.2.51

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
kanboardkanboardbefore 1.2.511.2.51Patch availableCNA
  • kanboard Vendorkanboard Affected before 1.2.51 Fixed in 1.2.51 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*before 1.2.51Vulnerablekanboard
  • cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:* Versions before 1.2.51 Vulnerable ·kanboard

Remediation

  • Fix · CNA kanboard (kanboard) Fixed in 1.2.51

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29056

References

Exploit 1

  • TI-2026-17582 Kanboard is Vulnerable to Reverse Proxy Authentication Bypass CVSS 3.1CRITICAL 9.1
  • TI-2025-34713 Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events CVSS 3.1CRITICAL 9.1
  • TI-2024-34653 Remote code execution through language setting in kanboard CVSS 3.1CRITICAL 9.1
  • TI-2024-34652 Arbitrary File Read and Delete in kanboard CVSS 3.1CRITICAL 9.1
  • TI-2025-32655 Kanboard Password Reset Poisoning via Host Header Injection CVSS 3.1HIGH 8.8
  • TI-2026-20954 Kanboard is Missing Access Control on Plugin Installation leading to Administrative RCE CVSS 3.1HIGH 8.5
See all 47 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences