Live2DWebCanvas <= 2.2.1 - Unauthenticated Arbitrary File Upload via 'modelApi' Parameter

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92895
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-06 12:17:24 UTC
Updated2026-11-06 16:19:00 UTC
DescriptionThe Live2DWebCanvas plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.2.1 via the download_one_file function. This is due to missing file extension whitelist and MIME type validation in download_one_file() when writing files derived from attacker-controlled manifest entries to the web-served plugin directory. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible when the plugin's apiType setting is configured as custom-local (self-hosted model mode), a non-default option that requires a paid license and prints the REST nonce and one-time session tokens into every front-end page.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

Problem Types: CWE-434 | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jiangweifang Live2DWebCanvas affected 2.2.1 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/live-2d/trunk/src/live2d-V2Api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/live-2d/trunk/src/live2d-V2Api.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/d6f6a941-972d-420f-bc56-e4b95... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/live-2d/trunk/wordpress-live2d.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/live-2d/trunk/src/live2d-V2Api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/live-2d/trunk/src/live2d-V2Api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/live-2d/trunk/src/live2d-V2Api.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Osman Hussein (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-24T00:00:00.000ZDiscovered
CNA2026-11-05T22:01:15.000ZDisclosed

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