InvoicePlane 1.7.2 Password Recovery Users::form user_email improper authorization

Summaryinfo

A vulnerability categorized as problematic has been discovered in InvoicePlane 1.7.2. Impacted is the function Users::form of the component Password Recovery. The manipulation of the argument user_email results in improper authorization. This vulnerability is cataloged as CVE-2026-100371. The attack may be launched remotely. There is no exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability classified as problematic has been found in InvoicePlane 1.7.2. Affected is the function Users::form of the component Password Recovery. The manipulation of the argument user_email with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. In version 1.7.2, an authorization guard to Users::change_password(), was added to address a previous authorization flaw that allowed a secondary administrator (user_type=1, user_id != 1) to directly change the password of the primary administrator (user_id=1) through users/change_password/{id}. That remediation, however, protects only the direct password-change operation. It does not protect the identity attribute that password recovery actually trusts: user_email. Users::form() applies no equivalent object-level authorization check when editing the primary administrator's account, and user_email is not included in PROTECTED_FIELDS. A secondary administrator can therefore rewrite the primary administrator's email address, then drive the public password-recovery flow — which resolves the account by user_email — to receive the reset token and take over user_id=1. The result is an alternate attack path that achieves the same impact PR #1638 was intended to prevent: cross-administrator full account takeover of the primary administrator. This issue has been patched via commit 8616fa4.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-100371 since 09/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Applying the patch 8616fa4 is able to eliminate this problem.

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Productinfo

Name

• InvoicePlane

Version

• 1.7.2

Website

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

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