Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-2354— Swiss Toolkit For WP <= 1.4.6 - Authenticated (Author+) Arbitrary File Upload via upload_extension_files()

Quick assessment

Affected
wpmessiah Swiss Toolkit For WP
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 Swiss Toolkit For WP是WordPress基金会的一款CMS插件工具。 WordPress Swiss Toolkit For WP 1.4.6及之前版本存在任意文件上传漏洞，该漏洞源于 函数中文件类型验证存在缺陷，使用 检查文件名是否包含扩展字符串而非验证实际文件扩展名，可能导致通过身份验证的攻击者上传任意文件，从而可能实现远程代码执行。

CVSS 8.8 · High EPSS 1.00% · P62

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpmessiah Swiss Toolkit For WP ≤ 1.4.6 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-2354

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Swiss Toolkit For WP <= 1.4.6 - Authenticated (Author+) Arbitrary File Upload via upload_extension_files()
Source: CVE Program / CVE List V5
Vulnerability Description
The Swiss Toolkit For WP plugin for WordPress is vulnerable to arbitrary file upload due to a flawed file type validation bypass in the `upload_extension_files()` function in all versions up to, and including, 1.4.6. The `upload_extension_files()` function hooks into WordPress's `wp_check_filetype_and_ext` filter and uses `strpos()` to check if a filename contains a configured extension string, rather than verifying the actual file extension. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files (including PHP) on the affected site's server which may make remote code execution possible, granted the "Enhanced Multi-Format Image Support" feature is enabled with at least one extension (e.g., avif) in the allowed formats.
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 Swiss Toolkit For WP 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Swiss Toolkit For WP是WordPress基金会的一款CMS插件工具。 WordPress Swiss Toolkit For WP 1.4.6及之前版本存在任意文件上传漏洞，该漏洞源于`upload_extension_files()`函数中文件类型验证存在缺陷，使用`strpos()`检查文件名是否包含扩展字符串而非验证实际文件扩展名，可能导致通过身份验证的攻击者上传任意文件，从而可能实现远程代码执行。
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
wpmessiah Swiss Toolkit For WP 0 ~ 1.4.6 -

II. Public POCs for CVE-2026-2354

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-2354

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-2354 (2)

News Coverage for CVE-2026-2354 (1)

Other References for CVE-2026-2354 (2)

IV. Related Vulnerabilities

Same product: Swiss Toolkit For WP
Same vendor: wpmessiah
Same weakness: CWE-434

V. Comments for CVE-2026-2354

No comments yet

Leave a comment