CRITICAL 9.1 CVE-2026-39353 Published 25 Sept 2026

InvoicePlane PHP Template Injection Vulnerability

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InvoicePlane, a self-hosted open source application for managing invoices, clients, and payments, is affected by a PHP template injection vulnerability. Prior to version 1.7.2-rc-1, InvoicePlane builds its permitted template list by scanning a PHP template directory that can be written through an administrator-controlled file-write capability.

A malicious PHP file placed in the directory is automatically trusted by Mdl_templates and can be selected as public_invoice_template. When a public invoice is rendered, the guest View controller includes the trusted file and executes it with web-server privileges.

  • Affected versions: prior to 1.7.2-rc-1
  • Precondition: administrator-controlled file-write capability
  • Impact: execution of malicious PHP with web-server privileges

This issue is fixed in version 1.7.2-rc-1.

Reference: CVE-2026-39353 on NVD

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