Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-105634
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-05 19:17:17 UTC
Updated2026-10-05 19:17:17 UTC
DescriptionPlane is an open-source project management tool. Prior to 1.3.0, the ProjectMemberViewSet.partial_update method allows any project member, including a user with the lowest GUEST role, to modify another project member's role. The authorization check prevents assigning a role higher than the requester's role but does not prevent assigning a lower or equal role, allowing a Guest to demote Administrators and Members and deny them project control. This vulnerability is fixed in 1.3.0.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Problem Types: CWE-269 | CWE-269 CWE-269: Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Makeplane Plane affected < 1.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c [email protected] github.com
github.com/makeplane/plane/pull/8833 [email protected] github.com
github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521 [email protected] github.com
github.com/makeplane/plane/releases/tag/v1.3.0 [email protected] github.com
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