EUVD-2026-71973
GHSA-jw76-hcp8-48r5
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable endpoint requires only authenticated access (PR:L); integrity impact is low (comment injection only), no confidentiality or availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
Plane through 1.4.2 fails to validate that issues belong to the deploy board's project in the public comment endpoint. Authenticated attackers can post comments to arbitrary issues across workspaces by supplying an issue_id parameter to the public deploy-board comment endpoint.
AnalysisAI
Broken object-level authorization (IDOR) in Plane through 1.4.2 allows authenticated attackers to post comments on arbitrary issues across any workspace by supplying a manipulated issue_id to the public deploy-board comment endpoint. The endpoint at apps/api/plane/space/views/issue.py (lines 258-275) performs no validation that the supplied issue belongs to the project associated with the deploy board, enabling cross-workspace data pollution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session on the Plane instance (PR:L) - any user account, including low-privilege guests, satisfies this requirement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N) captures the realistic impact well: network-exploitable with low complexity, requiring only authenticated access (PR:L), with a low integrity impact confined to the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch or confirmed fixed version has been identified in the available data at time of analysis; the vulnerability is tracked in GitHub issue #9441 (https://github.com/makeplane/plane/issues/9441). … Detailed patch versions, workarounds, and compensating controls in full report. |
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