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TI-2026-22900 Aliases CVE-2026-28685GHSA-v33r-r6h2-8wr7

Kimai: API invoice endpoint missing customer-level access control (IDOR)

Priority MEDIUM 62CWE-285Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-285.

Summary

Kimai is a web-based multi-user time-tracking application. Prior to version 2.51.0, "GET /api/invoices/{id}" only checks the role-based view_invoice permission but does not verify the requesting user has access to the invoice's customer. Any user with ROLE_TEAMLEAD (which grants view_invoice) can read all invoices in the system, including those belonging to customers assigned to other teams. This issue has been patched in version 2.51.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0045 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed kimai (kimai): 2.51.0kimai/kimai (Packagist): 2.51.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
kimaikimaibefore 2.51.02.51.0Patch availableCNA
—kimai/kimai (Packagist)before 2.51.02.51.0Patch availableGHSA-v33r-r6h2-8wr7
  • kimai Vendorkimai Affected before 2.51.0 Fixed in 2.51.0 Patch available CNA
  • kimai/kimai (Packagist) Vendor— Affected before 2.51.0 Fixed in 2.51.0 Patch available GHSA-v33r-r6h2-8wr7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:*before 2.51.0Vulnerablekimai
  • cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:* Versions before 2.51.0 Vulnerable ·kimai

Remediation

  • Fix · CNA kimai (kimai) Fixed in 2.51.0
  • Fix · GHSA-v33r-r6h2-8wr7 kimai/kimai (Packagist) Fixed in 2.51.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28685
  2. 2026-10-03 Alias added: GHSA-v33r-r6h2-8wr7

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2023-30240 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking CVSS 4.0HIGH 8.5
  • TI-2026-30580 Kimai: Formula Injection via tag names in XLSX export CVSS 4.0MEDIUM 5.4
  • TI-2026-29230 Kimai: Stored XSS via Incomplete HTML Attribute Escaping in Team Member Widget CVSS 3.1MEDIUM 5.4
  • TI-2019-15371 Kimai 2- persistent cross-site scripting (XSS) CVSS 4.0MEDIUM 5.1
  • TI-2026-29237 Kimai's User Preferences API allows standard users to modify restricted attributes: hourly_rate, internal_rate CVSS 3.1MEDIUM 4.3
  • TI-2026-30084 Kimai: Team API Missing Object-Level Authorization CVSS 3.1LOW 3.3
See all 13 →

Sources

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