Cross-Boundary Data Modification in Plane Project Management Tool
CVE-2026-39374

6.5MEDIUM

Key Information:

Vendor

Makeplane

Status
Plane
Vendor
CVE Published:
7 April 2026

What is CVE-2026-39374?

In the Plane project management tool, prior to version 1.3.0, a flaw in the IssueBulkUpdateDateEndpoint permits project members (either ADMIN or MEMBER) to alter the start_date and target_date of any issue across the entire Plane instance. This occurs without adequate workspace or project membership restrictions, leading to unauthorized data manipulation across different projects. The vulnerability allows critical cross-boundary modifications, enabling users to impact projects they are not associated with. The issue has been resolved in version 1.3.0.

Affected Version(s)

plane < 1.3.0

References

https://github.com/makeplane/plane/security/advisories/GH...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.