EUVD-2026-36066Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Primary rating from Vendor (GitHub_M) · only source for this CVE.
CVSS VectorVendor: GitHub_M
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Lifecycle Timeline
3DescriptionCVE.org
Plane is an open-source project management tool. Prior to version 1.3.1, there is a cross-workspace asset authorization bypass lets any authenticated user read, copy, delete, and overwrite assets in other Plane workspaces. This issue has been patched in version 1.3.1.
AnalysisAI
Cross-workspace authorization bypass in Plane (makeplane) prior to version 1.3.1 allows any authenticated user of one workspace to read, copy, delete, and overwrite file assets belonging to other workspaces on the same instance. The flaw stems from missing membership checks on V2 asset endpoints and is fixed in v1.3.1; no public exploit identified at time of analysis.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated account on the same Plane instance (any workspace role suffices, matching CVSS PR:L) and network reachability to the Plane API. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L reflects a network-exploitable bug requiring only low privileges (any authenticated workspace user) with no user interaction, yielding high confidentiality and integrity impact and low availability impact - consistent with a tenant-isolation break on a SaaS-style product. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or is invited to any low-privilege workspace on a shared Plane instance, then issues authenticated API calls to the V2 WorkspaceFileAssetEndpoint or DuplicateAssetEndpoint referencing asset identifiers belonging to a victim workspace. Because membership is not enforced, the attacker can download confidential attachments, overwrite or delete them, or duplicate them into their own workspace for exfiltration. … |
| Remediation | Vendor-released patch: Plane v1.3.1, available at https://github.com/makeplane/plane/releases/tag/v1.3.1, with details in GHSA-qw87-v5w3-6vxx (https://github.com/makeplane/plane/security/advisories/GHSA-qw87-v5w3-6vxx); upgrade is the primary and recommended remediation as it adds @allow_permission to all WorkspaceFileAssetEndpoint methods and scopes DuplicateAssetEndpoint's source-asset lookup to workspaces where the caller is an active member. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Determine Plane version and whether multi-workspace deployments are in use; audit recent access logs for suspicious cross-workspace API activity. …
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