Greenshift 11.4 - 11.4.5 - Authenticated (Subscriber+) Arbitrary File Upload
Vulnerability Description
The Greenshift – animation and page builder blocks plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the gspb_make_proxy_api_request() function in versions 11.4 to 11.4.5. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible. The arbitrary file upload was sufficiently patched in 11.4.5, but a capability check was added in 11.4.6 to properly prevent unauthorized limited file uploads.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Michael Mazzolini
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0db4671e-1989-44a4-babe-ed699c7f3a52?source=cve
- https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/trunk/init.php#L3340
- https://plugins.trac.wordpress.org/changeset/3270279/greenshift-animation-and-page-builder-blocks/trunk/init.php
- https://plugins.trac.wordpress.org/changeset/3276168/greenshift-animation-and-page-builder-blocks/trunk/init.php
- https://plugins.trac.wordpress.org/changeset/3273212/greenshift-animation-and-page-builder-blocks/trunk/init.php
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