Plane: Stored XSS via SVG attachment served inline on the application origin (account takeover)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-105630
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-05 18:17:36 UTC
Updated2026-10-05 19:17:17 UTC
DescriptionPlane 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.

Risk And Classification

Primary CVSS: v3.1 8.7 HIGH from [email protected]

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

Problem Types: CWE-79 | CWE-434 | CWE-616 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CWE-434 CWE-434: Unrestricted Upload of File with Dangerous Type | CWE-616 CWE-616: Incomplete Identification of Uploaded File Variables (PHP)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
3.1CNADECLARED8.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Makeplane Plane affected < 1.4.0 Not specified

References

ReferenceSourceLinkTags
github.com/makeplane/plane/releases/tag/v1.4.0 [email protected] github.com
github.com/makeplane/plane/commit/9dff20e04808286acb372119d88c666b802b1d50 [email protected] github.com
github.com/makeplane/plane/security/advisories/GHSA-ch8j-vr4r-qf6h 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/makeplane/plane/pull/9312 [email protected] github.com
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