makeplane Plane up to 1.3.x Project Invitation information disclosure

Summaryinfo

A vulnerability was found in makeplane Plane up to 1.3.x. It has been rated as problematic. This affects an unknown part of the component Project Invitation. Performing a manipulation results in information disclosure. This vulnerability is cataloged as CVE-2026-104978. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in makeplane Plane up to 1.3.x. This affects an unknown function of the component Project Invitation. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Plane is an open-source project management tool. Prior to 1.4.0, Plane's project invitation list endpoint is accessible to any authenticated user who knows the workspace slug and project ID, while the public project invitation join endpoint accepts an invitation based only on a submitted email address. When a pending invitation targets an email address that has not registered with Plane, an attacker can enumerate the invitation, register an account using the invited email without mailbox verification, and accept the invitation. The attacker-controlled account is then added to the target workspace and project. This issue is fixed in 1.4.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-104978 since 10/02/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 1.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• makeplane

Name

• Plane

Version

• 1.0
• 1.1
• 1.2
• 1.3

Website

• Product: https://github.com/makeplane/plane/

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