# CVE-2026-102985: Plane project management missing authorization checks

Source: https://junglewise.ai/threats/cve-2026-102985-plane-is-an-open-source-project-management-tool-in-1-3-1-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-102985 · Severity: medium · CVSS 6.5 · Published 2026-10-14

Plane is an open-source project management platform used by teams to organize workflows and collaborate. In versions 1.3.1 and earlier, an attacker with guest-level project access could deactivate any project member—including administrators—or modify other members' preferences without permission, gaining complete control over the project.

Technologies: [Plane](https://junglewise.ai/threats/technologies/plane-plane). Vendors: [Plane](https://junglewise.ai/threats/vendors/plane).

## Quick answers

**Is CVE-2026-102985 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102985 being exploited in the wild.

**How severe is CVE-2026-102985?** Medium severity, with a CVSS score of 6.5, published 14 October 2026.

**Which products and versions are affected?** Plane 1.3.1 and earlier.

**Is there a fix for CVE-2026-102985?** Yes: fixed in 1.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-102985 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-102985?** Check whether you run Plane at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.4.0

## Technical details

Two missing object-level authorization checks in the API: (1) ProjectMemberViewSet.partial_update nests all authorization logic inside a role-update branch, allowing an attacker to omit the role field and modify the is_active flag of any other member via PATCH, including deactivating project admins; (2) ProjectMemberPreferenceEndpoint.patch trusts the member_id path parameter and permits overwriting any member's preferences. Both flaws require only guest project membership and allow privilege escalation or membership disruption.

## Affected products

- Plane Plane 1.3.1 and earlier

## Timeline

- 2026-10-14: disclosed
- 2026-07-09: patched

## References

- [https://github.com/makeplane/plane/commit/dc9d80b2d2a499b967f0b541e083b283f463719f](https://github.com/makeplane/plane/commit/dc9d80b2d2a499b967f0b541e083b283f463719f)
- [https://github.com/makeplane/plane/pull/9367](https://github.com/makeplane/plane/pull/9367)

## Related threats

- [Plane order_by injection in issue-listing endpoints](https://junglewise.ai/threats/cve-2026-102988-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane stored XSS in comments and intake descriptions](https://junglewise.ai/threats/cve-2026-102982-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane workspace invitation token disclosure and hijack](https://junglewise.ai/threats/cve-2026-102981-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane hardcoded Django SECRET_KEY in community deployments](https://junglewise.ai/threats/cve-2026-105641-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane workspace invitation hijacking and token disclosure](https://junglewise.ai/threats/cve-2026-105639-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)