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CVE-2026-11426— UnderConstructionPage PRO <= 5.76 - Authenticated (Subscriber+) Arbitrary File Read via template_thumbnail Parameter

Quick assessment

Affected
WebFactory Under Construction Page (Pro)
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 UnderConstructionPage PRO是WordPress基金会的一款信息化产品 WordPress UnderConstructionPage PRO 5.76及之前版本存在路径遍历漏洞，该漏洞源于插件接受template_thumbnail参数中的任意本地文件路径并将其内容复制到可公开访问的上传文件中，可能导致经过身份验证的攻击者（具有订阅者级及以上权限）读取服务器上的任意文件，其中可能包含敏感信息。

CVSS 6.5 · Medium EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
WebFactory Under Construction Page (Pro) ≤ 5.76 affected
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I. Basic Information for CVE-2026-11426

Vulnerability Information
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Vulnerability Title
UnderConstructionPage PRO <= 5.76 - Authenticated (Subscriber+) Arbitrary File Read via template_thumbnail Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The UnderConstructionPage PRO plugin for WordPress is vulnerable to Arbitrary File Read in all versions up to, and including, 5.76. This is due to the plugin accepting arbitrary local file paths in the template_thumbnail parameter and copying their contents into a publicly accessible uploads file. This makes it possible for authenticated attackers, with Subscriber-level access and above, to read arbitrary files on the server, which can contain sensitive information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress UnderConstructionPage PRO 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress UnderConstructionPage PRO是WordPress基金会的一款信息化产品 WordPress UnderConstructionPage PRO 5.76及之前版本存在路径遍历漏洞，该漏洞源于插件接受template_thumbnail参数中的任意本地文件路径并将其内容复制到可公开访问的上传文件中，可能导致经过身份验证的攻击者（具有订阅者级及以上权限）读取服务器上的任意文件，其中可能包含敏感信息。
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
WebFactory Under Construction Page (Pro) 0 ~ 5.76 -

II. Public POCs for CVE-2026-11426

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III. Intelligence Information for CVE-2026-11426

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Vendor Advisories for CVE-2026-11426 (1)

Other References for CVE-2026-11426 (1)

IV. Related Vulnerabilities

Same vendor: WebFactory
Same weakness: CWE-22

V. Comments for CVE-2026-11426

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