InvoicePlane up to 1.7.1 Setting Settings::index tax_rate_decimal_places sql injection

Summaryinfo

A vulnerability identified as problematic has been detected in InvoicePlane up to 1.7.1. This affects the function Settings::index of the component Setting Handler. This manipulation of the argument tax_rate_decimal_places causes sql injection. This vulnerability is registered as CVE-2026-33639. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in InvoicePlane up to 1.7.1. It has been declared as problematic. Affected by this vulnerability is the function Settings::index of the component Setting Handler. The manipulation of the argument tax_rate_decimal_places with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2, InvoicePlane interpolates the administrator-controlled tax_rate_decimal_places setting into an ALTER TABLE statement for ip_tax_rates in Settings::index() without strict integer validation. A crafted setting value can add clauses to the schema-changing statement and remove or alter required database columns. The resulting schema corruption can permanently modify financial data structures and make the application unavailable. This vulnerability is fixed in 1.7.2.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-33639 since 03/23/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

Upgrading to version 1.7.2 eliminates this vulnerability.

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Productinfo

Name

• InvoicePlane

Version

• 1.7.0
• 1.7.1

Website

• Product: https://github.com/InvoicePlane/InvoicePlane/

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