Templately <= 3.7.1 - Authenticated (Contributor+) Arbitrary File Upload to Remote Code Execution via Gutenberg Cloud Import Attachment Filename Mismatch

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18438
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 10:16:29 UTC
Updated2026-08-20 12:48:10 UTC
DescriptionThe Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud! plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.7.1 via the fetch_remote_file function. This is due to a filename validation/destination mismatch in fetch_remote_file, where file type validation is performed against the attacker-controlled Content-Disposition filename rather than the URL-path-derived destination filename. This makes it possible for authenticated attackers, with contributor-level access and above, to execute code on the server. A GIF+PHP polyglot file passes wp_check_filetype_and_ext validation as image/gif via the Content-Disposition filename, while the actual destination path is written with a .php extension derived from the URL path, bypassing the unfiltered_upload capability gate entirely. The affected endpoints are reachable at this privilege level because Templately's entire REST API — including the cloud import endpoints used in this attack (/templately/v1/clouds/upload and /templately/v1/insert) — is authorized only by a current_user_can('delete_posts') check, with no administrator or manage_options capability requirement. The same permission gate also allows a contributor to overwrite the site's global Templately cloud connection via the /templately/v1/login endpoint with global_signin set to true. A complete remediation should both correct fetch_remote_file to validate the file type against the actual destination filename rather than the Content-Disposition header (and avoid deriving the write path from the request URL), and restrict state-changing Templately REST routes to an appropriate administrator-level capability.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.009830000 probability, percentile 0.595820000 (date 2026-08-20)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wpdevteam Templately Elementor Gutenberg Template Library 6500 Free Pro Ready Templates And Cloud! affected 3.7.1 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Importer/WPImport... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Importer/WPImport... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Platform/Gutenber... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3636643/templately/trunk/includes/Core/Importer/WPI... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Importer/WPImport... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/API/API.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/API/MyClouds.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/API/API.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/API/MyClouds.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/API/Import.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Platform/Gutenber... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/API/Import.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.7.1/includes/Core/Importer/WPImport... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Importer/WPImport... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/4e68b2f2-12e4-4ff2-919d-26d6b... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/templately/tags/3.6.5/includes/Core/Importer/WPImport... [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: Dmitrii Ignatyev (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-30T20:38:18.000ZVendor Notified
CNA2026-08-14T20:45:28.000ZDisclosed

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