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CVE-2025-9561— AP Background 3.8.1 - 3.8.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Upload via advParallaxBackAdminSaveSlider Function

Quick assessment

Affected
hovanesvn AP Background
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin AP Background 3.8.1版本至3.8.2版本存在代码问题漏洞，该漏洞源于缺少授权和文件验证不足，可能导致任意文件上传和远程代码执行。

CVSS 8.8 · High EPSS 0.59% · P45
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I. Basic Information for CVE-2025-9561

Vulnerability Information
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Vulnerability Title
AP Background 3.8.1 - 3.8.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Upload via advParallaxBackAdminSaveSlider Function
Source: CVE Program / CVE List V5
Vulnerability Description
The AP Background plugin for WordPress is vulnerable to arbitrary file uploads due to missing authorization and insufficient file validation within the advParallaxBackAdminSaveSlider() handler in versions 3.8.1 to 3.8.2. 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.
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 plugin AP Background 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin AP Background 3.8.1版本至3.8.2版本存在代码问题漏洞，该漏洞源于缺少授权和文件验证不足，可能导致任意文件上传和远程代码执行。
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
hovanesvn AP Background 3.8.1 ~ 3.8.2 -

II. Public POCs for CVE-2025-9561

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III. Intelligence Information for CVE-2025-9561

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Same Patch Batch · hovanesvn · 2025-10-03 · 3 CVEs total

CVE-2025-10165 6.4 MEDIUM AP Background <= 3.8.2 - Authenticated (Contributor+) Stored Cross-Site Scripting
CVE-2025-9897 4.3 MEDIUM AP Background <= 3.8.2 - Cross-Site Request Forgery

IV. Related Vulnerabilities

Same product: AP Background
Same vendor: hovanesvn
Same weakness: CWE-434

V. Comments for CVE-2025-9561

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