XSS in Makeplane Plane
CVE-2026-105630
Plane is an open-source project management tool. Prior to 1.4.0, an authenticated low-privilege workspace member, including a Guest, can upload an image/svg+xml file as a generic or issue attachment. The file retains the attacker-controlled Content-Type, and the asset-download endpoint creates a presigned URL with Content-Disposition: inline. In the default self-hosted MinIO deployment, the asset URL is served from the same origin as the Plane application, allowing embedded SVG JavaScript to execute in the application's security context. A victim, including a workspace administrator, who opens the link can have the session compromised through stored XSS, leading to account takeover. This issue is fixed in 1.4.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Makeplane Plane — versions < 1.4.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-105630?
- CVE-2026-105630 is a high-severity vulnerability in Makeplane Plane, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-10-05.
- How severe is CVE-2026-105630?
- High severity. CVSS v3 base score is 8.7 out of 10.