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CVE-2026-18438— Templately <= 3.7.1 - Authenticated (Contributor+) Arbitrary File Upload to Remote Code Execution via Gutenberg Cloud Import Attachment Filename Mismatch

Quick assessment

Affected
wpdevteam Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud!
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Templately是WordPress基金会的一款提供海量模板与云端同步的网站搭建插件。 WordPress Templately 3.7.1及之前版本存在任意文件上传漏洞，该漏洞源于fetch_remote_file函数中文件名验证与目标路径不匹配，文件类型验证基于攻击者控制的Content-Disposition文件名而非URL路径派生的目标文件名，可能导致经认证的攻击者上传GIF+PHP多语言文件并在服务器上执行代码。

CVSS 8.8 · High EPSS 1.31% · P70

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpdevteam Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud! ≤ 3.7.1 affected
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I. Basic Information for CVE-2026-18438

Vulnerability Information
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Vulnerability Title
Templately <= 3.7.1 - Authenticated (Contributor+) Arbitrary File Upload to Remote Code Execution via Gutenberg Cloud Import Attachment Filename Mismatch
Source: CVE Program / CVE List V5
Vulnerability Description
The 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Templately 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Templately是WordPress基金会的一款提供海量模板与云端同步的网站搭建插件。 WordPress Templately 3.7.1及之前版本存在任意文件上传漏洞，该漏洞源于fetch_remote_file函数中文件名验证与目标路径不匹配，文件类型验证基于攻击者控制的Content-Disposition文件名而非URL路径派生的目标文件名，可能导致经认证的攻击者上传GIF+PHP多语言文件并在服务器上执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpdevteam Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud! 0 ~ 3.7.1 -

II. Public POCs for CVE-2026-18438

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III. Intelligence Information for CVE-2026-18438

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Patches & Fixes for CVE-2026-18438 (6)

Vendor Advisories for CVE-2026-18438 (1)

Vendor Pages for CVE-2026-18438 (1)

Other References for CVE-2026-18438 (2)

IV. Related Vulnerabilities

Same product: Templately – Elementor & Gutenberg Template Library: 6500+ Free & Pro Ready Templates And Cloud!
Same vendor: wpdevteam
Same weakness: CWE-434

V. Comments for CVE-2026-18438

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